Natural remedies for nummular dermatitis

There are types of dermatitis that come as a diffuse wave, red on children’s faces or the inner elbow, without clear borders. And there is a stranger dermatitis, one that chooses precise shapes, as if someone drew coins on the skin with a pencil. Round, well-defined patches, with slightly raised borders, 2 to 10 centimetres wide, sit on the forearm, calf, thigh, sometimes on the trunk. The skin inside each coin is red, dry, cracks, itches, sometimes oozes, and after healing leaves a brown mark that lasts for months. This is nummular dermatitis, also called discoid or nummular eczema (from the Latin word “nummus”, which means coin).

Nummular dermatitis appears mainly in winter, when dry indoor air from heated homes and washing with harsh soaps steal water from the skin. It affects mostly men over 50, smokers, those with poor leg venous circulation, but also women after childbirth or people with chronic stress. Cases increase visibly from November to March, and the secret of natural treatment is one thing: deep, constant hydration over weeks.

In this article you will find remedies tested by country doctors, grandmothers and dermatologists who believe skin has memory and responds to gentleness. You will learn how to recognise the disease, when to treat it at home and when to see a doctor, and why some “miracle” creams from ads actually make the problem worse.

Table of contents

• What is nummular dermatitis and how it looks
• Why the round patches appear
• Remedy 1: Chamomile tea compresses
• Remedy 2: Colloidal oatmeal baths
• Remedy 3: Calendula ointment
• Remedy 4: Coconut oil and shea butter
• Remedy 5: White clay with olive oil
• Diet that supports the skin
• Practical care tips
• Internal hydration and home humidification
• When to see a doctor
• Frequently asked questions

What is nummular dermatitis and how it looks

Nummular dermatitis is a form of eczema characterised by round or oval, well-defined patches that resemble coins stuck on the skin. Unlike atopic dermatitis, the borders are very clear, and the inside of the patches goes through several stages.

Stages of evolution:

• Acute phase: intense redness, small vesicles full of clear fluid, severe itching, sometimes oozing
• Subacute phase: patches dry out, yellow-brown crusts appear, skin peels, itching remains
• Chronic phase: skin thickens, lichenification appears (old-skin aspect with deep furrows), colour becomes grey-brown
• Resolution phase: patches gradually disappear, but a brown spot (post-inflammatory hyperpigmentation) remains and can last 6 to 12 months

Frequent locations:

• Forearms, especially the outer side
• Shins, especially the pretibial zone (in front of the tibia)
• Thighs
• Hands, especially the back
• Trunk, lower back
• Rarely face or scalp

Differentiation: Many people confuse nummular dermatitis with ringworm (tinea, a fungal infection), because it also produces round patches. The difference is that ringworm has an active outer ring and a centre that is already healed, while nummular dermatitis has the entire patch affected, with unified evolution.

Why the round patches appear

The exact cause is multifactorial and not fully understood. However, triggering factors are well known.

Dry skin (xerosis) is the main ground. In older people, sebaceous glands produce less sebum, and the stratum corneum loses water. Dry winter air amplifies the problem. Radiators at 25 degrees and humidity below 40 percent are the perfect combination for dermatitis.

Repeated minor trauma can trigger patches. Accidental scratches, insect bites, old scars, contact zones with rough materials (wool) often become the nucleus of patches.

Chronic infections such as dental infections, chronic sinusitis, minor skin infections (with Staphylococcus aureus) can maintain systemic inflammation.

Chronic venous insufficiency in the legs leads to patches mainly on the calves. Blood stagnates, tissues are poorly oxygenated, skin becomes fragile.

Smoking and chronic alcohol use reduce circulation and deeply dehydrate the skin.

Emotional stress is a recognised factor. Many people notice patches appear or worsen during periods of distress.

Medications such as beta-blockers, statins, oral isotretinoin can excessively dry the skin and trigger dermatitis.

Nutritional deficiencies: lack of zinc, vitamin A, vitamin D, essential fatty acids.

Remedy 1: Chamomile tea compresses

Chamomile (Matricaria chamomilla) is the calming king of eczemas. It contains alpha-bisabolol, chamazulene, apigenin, substances with anti-inflammatory, cicatrising, antibacterial and mild antihistaminic effect. Chamomile tea compresses calm itching almost instantly and speed up patch healing.

Preparation:

1. Put 2 tablespoons of dried chamomile flowers in 500 ml of boiling water
2. Cover and let infuse for 15 minutes
3. Strain through gauze and let cool to room temperature
4. Dip a piece of clean gauze or a cotton handkerchief in the tea
5. Apply on the patch for 15 minutes, wetting again when it starts drying

Done 2 to 3 times a day. After each compress, an emollient cream is applied on still-damp skin to capture water.

Tip: The tea can be prepared in larger quantity in the morning, 1 litre, and kept in the fridge all day. Cold compresses are even more soothing for itch than warm ones.

Chamomile as a bath for large areas

If you have multiple patches on the body, you can take a chamomile bath. Prepare 2 litres of concentrated tea (8 tablespoons flowers in 2 litres of water), strain and add to a bathtub with lukewarm water (not hot, which irritates). Stay 15 minutes. Do not rinse with clean water afterwards, just pat with a soft towel.

Remedy 2: Colloidal oatmeal baths

Colloidal oatmeal (Avena sativa) is one of the most researched natural remedies for eczema. The US FDA officially approves it as a treatment for skin itching. It contains avenanthramides, unique substances with anti-inflammatory, soothing and skin-barrier-repairing effect.

How to prepare colloidal oatmeal at home:

1. Take 100 grams of whole oat flakes (organic if possible)
2. Grind them very fine in a coffee grinder or strong blender until powder consistency
3. Test the powder quality: if you mix a teaspoon with a glass of water, the water should become milky and stay in suspension

Application:

For isolated patches: mix 2 tablespoons of powder with lukewarm water until you get a paste. Apply on patches, leave for 20 minutes, rinse very gently and pat dry.

For bath: pour half a glass of powder into the bathtub with lukewarm water. Stay 15 to 20 minutes. Get out and pat dry with the towel without rubbing.

Done daily, 10 consecutive days. After the attack period, maintain twice a week until complete disappearance of patches.

Remedy 3: Calendula ointment

Calendula (Calendula officinalis) is perhaps the most popular skin remedy in folk medicine. The flavonoids and saponins it contains stimulate tissue regeneration and have antimicrobial effect.

Classic ointment recipe:

Ingredients:

• 100 ml macerated calendula oil (flowers placed in olive oil in the sun for 40 days)
• 12 grams natural beeswax
• 10 drops lavender essential oil (optional)

Preparation:

1. Melt the wax in a water bath
2. Add calendula oil and mix until homogeneous
3. Remove from heat, wait 2 minutes, add lavender oil
4. Pour into small glass jars and let cool

Application: On patches in subacute or chronic phase, apply a thin layer 2 to 3 times a day after gentle cleansing of the area. Do not apply on oozing patches in the acute phase.

Good artisanal ointment keeps 6 months in a cool dark place. It smells beautifully, of hay and honey, and you can also use it on scratches, minor burns, irritated nursing nipples, and baby chafing.

Alternative for those in a hurry

If you do not have time to prepare the ointment, you can find calendula ointments in various brands at natural pharmacies. Read the label. Look for “Calendula officinalis” as the first ingredient and avoid products with synthetic fragrance and parabens.

Remedy 4: Coconut oil and shea butter

Once patches pass the acute (oozing) phase, skin needs fat, lots of it, constantly. Extra virgin coconut oil and shea butter are the best for nummular dermatitis.

Extra virgin coconut oil has antibacterial properties (lauric acid), is deeply hydrating and hypoallergenic for most people. Apply on still-damp skin after shower, twice a day.

Unrefined shea butter contains vitamins A, E, F, essential fatty acids, triterpenes. Has anti-inflammatory effect and restores the skin barrier. Apply in small amount, warmed between palms, on chronic patches and dry areas.

Personalised mix:

50 g coconut oil + 50 g shea butter + 10 drops Roman chamomile essential oil. Melt gently in a water bath, pour into jar, let solidify. Use twice a day on patches and surrounding areas.

Warning for testing

Some people are sensitive to coconut. Test the mixture on the inner forearm 24 hours before applying on large patches. If redness or itching appears, choose only shea butter.

Remedy 5: White clay with olive oil

For subacute phase patches with peeling, a mask of white clay (kaolin) with olive oil has gentle exfoliation and nourishing effect at the same time. The clay absorbs dead cells and deposits, while the oil keeps skin hydrated.

Recipe:

• 1 tablespoon pure white clay
• 1 teaspoon extra virgin olive oil
• lukewarm still water, enough to get a creamy paste

Apply on patches, leave for 10 minutes (do not let it dry completely), rinse with lukewarm water and immediately apply a layer of coconut oil or shea butter.

Done once a week, no more, to avoid thinning already fragile skin.

Diet that supports the skin

Skin is the last destination of nutrients. If the gut and liver work well, skin will respond.

To include in diet:

• Oily fish (salmon, mackerel, sardines) twice a week for omega 3
• Fresh organic eggs for biotin and choline
• Leafy green vegetables (spinach, rocket, lettuce) for folic acid
• Pumpkin, carrot, sweet potato for beta-carotene (vitamin A precursor)
• Nuts and seeds (walnuts, flax seeds, hemp seeds) for vitamin E
• Beef liver once a week for vitamin A and iron
• Artisan yoghurt or kefir for probiotics
• Pumpkin seeds for zinc
• Gelatin or bone broth for collagen

To avoid:

• Refined sugar which maintains inflammation
• Refined vegetable oils (industrial sunflower, corn, soy)
• Alcohol, especially in smokers
• Excess coffee which dehydrates
• Ultra-salty foods that accentuate skin dryness

Daily hydration

Drink 2 litres of water per day. It seems a lot, but for skin with nummular dermatitis it is essential. Still water, unsweetened teas, soups, all count. Coffee and alcohol lower the balance.

Practical care tips

Small daily habits make the difference between healed skin and recurring patches.

Shower:

• Temperature under 37 degrees. Water too hot destroys the skin’s lipid layer
• Duration under 10 minutes
• Natural soap without SLS, without synthetic fragrance, without sulphates
• Instead of classic soap, you can use a hydrating shower oil
• Do not scrub patches with a sponge
• Pat dry with the towel, do not rub
• Apply cream or oil on damp skin within 3 minutes after leaving

Clothing:

• Cotton, linen, silk, the more natural the better
• Avoid wool directly on skin (over a cotton shirt is ok)
• Avoid polyester, acrylic fibre
• Wash with hypoallergenic detergent, no fragrance
• Rinse twice to avoid detergent residue

Environment:

• Humidity above 50 percent. Use a humidifier, put water bowls on radiators
• Bedroom temperature 18 to 20 degrees
• Avoid places with direct draft
• Air the room morning and evening for 5 to 10 minutes

Managing itch:

• Do not scratch, tap gently with the palm if unbearable
• Keep nails very short
• At night you can wear thin cotton gloves
• Cold compresses help enormously

Internal hydration and home humidification

Humidity is the most neglected component of the treatment. Many people do not know that in winter, with radiators on, home humidity drops below 30 percent, meaning below Saharan levels on some days. Genetically dry skin stands no chance.

How to measure humidity:

A digital hygrometer is mandatory. Put it in the bedroom and living room. Check twice a day. The ideal is 50 to 60 percent.

How to raise humidity:

• Cool mist humidifier, the most effective
• Ceramic bowls with water on radiators
• Clothes drying on racks in the room
• Houseplants (Spathiphyllum, Sansevieria, Pachira) that release vapour
• Small decorative fountains
• Avoid ultrasonic humidifiers without filter, which spread minerals

When to see a doctor

Nummular dermatitis is a chronic condition requiring medical supervision, especially if:

• Patches are oozing, with pus, dense yellow crusts (suspicion of bacterial superinfection)
• Itching is so severe that it affects sleep for days
• General symptoms appear: fever, swollen lymph nodes, altered general state
• Patches spread rapidly beyond 10 cm in diameter
• You do not notice improvement after 3 weeks of correct natural treatment
• You have associated conditions: diabetes, severe venous insufficiency, cancer
• You are pregnant or breastfeeding

The dermatologist may recommend topical corticosteroid creams for the acute phase, topical or oral antibiotics if superinfection exists, prescription emollients, and in resistant cases, UVB phototherapy.

Frequently asked questions

1. Is nummular dermatitis contagious?

No, it does not pass from one person to another. Unlike ringworm (which is fungal and contagious), nummular dermatitis is an inflammatory reaction of one’s own skin. You can sleep, hug, share a bathroom without any problem.

2. Does the disease come back after healing?

Yes, nummular dermatitis tends to recur, especially in winter. But with proper care (daily hydration, avoiding harsh soaps, home humidity, correct diet), episodes become rarer and milder. Some people have no more flares after changing their lifestyle.

3. Can I sunbathe if I have nummular dermatitis?

Moderate sun is beneficial. Natural UVB lowers inflammation. But you must avoid burns. 15 to 30 minutes early morning or evening, with SPF 30 cream on already healed patches (to prevent the brown mark), is ideal. Hours of sun worsen dehydration.

4. Can children get nummular dermatitis?

Yes, although it is rarer in children than adults. It shows similarly, with round patches on arms and calves, especially in winter. Treatment is the same, with emphasis on gentle emollients, oatmeal baths and cotton clothes. Avoid coloured soaps and SLS foaming products.

5. Why does the brown mark remain after the patch heals?

It is post-inflammatory hyperpigmentation, a reaction of melanocytes to inflammation. It disappears by itself in 6 to 12 months. To speed up, use SPF 50 on the mark (without sun, the mark fades faster) and niacinamide or tranexamic acid creams (dermatologist-prescribed).

6. Is there a link between nummular dermatitis and food allergies?

More rarely than in atopic dermatitis. Still, in some people, histamine-rich foods (aged cheeses, red wine, canned fish, tomatoes) worsen itching. A 3-week period on a low-histamine diet can help identify triggers.

7. Is it necessary to take antihistamines?

Not always. If itching is unbearable and affects sleep, a second-generation antihistamine (loratadine, cetirizine) can help, especially in the evening. For skin sensitive at falling asleep, older drugs (diphenhydramine) have a useful sedative effect. Discuss with your doctor.

Conclusion

Nummular dermatitis is a condition that requires patience, gentleness and consistency. The round patches on forearms and calves, few at first, can become companions for years if you ignore skin signals. However, with correct care, with grandmothers’ remedies and with modern attention to home humidity and diet, the skin recovers almost completely, and relapses become rare.

Remember the essential principles: hydrate constantly (internally and externally), calm itching with cold chamomile compresses and oatmeal baths, maintain skin with calendula, coconut oil and shea butter, avoid aggressive soaps, keep home humidity and drink plenty of water. These simple gestures, repeated day by day, week by week, make skin remember its natural shape and give up the red coins that mark it.

If patches persist or worsen, do not delay the dermatology consultation. Sometimes a combination of conventional treatment and natural remedies is the wisest path.