Skin Diseases 2022

Dyshidrosis: what é, symptoms, causes and treatment

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Dyshidrosis: what é, symptoms, causes and treatment
Dyshidrosis: what é, symptoms, causes and treatment

Dyshidrosis is a skin condition that causes small, fluid-filled blisters to form, which usually appear on the palms of the hands, the sides of the fingers, or the soles of the feet. Dyshidrosis blisters cause intense itching that can last up to 3 weeks.

The causes of dyshidrosis are not known, however it appears to be related to skin allergies, excessive moisture in the hands or feet, and increased physical or emotional stress. Dyshidrosis, also known as dyshidrotic eczema or dehidrosis, is not a contagious disease and therefore there is no danger of transmission, even if it comes in direct contact with another person's skin.

Whenever dyshidrosis is suspected, it is important to consult a dermatologist to confirm the diagnosis and initiate appropriate treatment, which may include daily skin care, use of medication or procedures such as phototherapy or botox.

Main symptoms

The main symptom of dyshidrosis is the formation of small blisters containing fluid that are very itchy. In addition, it can still appear:

  • Skin peeling;
  • Pain in or around blisters;
  • Excessive moisture around the affected skin area;
  • Dry or cracked skin after blisters disappear.

Blisters usually dry and flake off in about three weeks after they appear.

How to confirm the diagnosis

The diagnosis of dyshidrosis is made by the dermatologist through a physical examination of the skin, assessing the severity of symptoms such as redness, scaling or itching, in addition to the number of blisters and the extent of the affected area.

Usually, lab tests are not necessary for diagnosing dyshidrosis, however, the doctor may order tests to exclude other he alth problems, such as scraping the affected skin to check for the presence of fungi that can cause chilblains or allergic test to certain substances, for example.See how the allergy test is done.

Possible causes

The exact cause of dyshidrosis is not known, however, it is more frequent during the summer and some factors can contribute to its appearance such as:

  • Family history of dyshidrotic eczema;
  • Increased emotional or physical stress;
  • Allergies, such as hay fever;
  • Atopic dermatitis or contact dermatitis;
  • Wash your hands frequently;
  • Exercise a professional activity that requires frequent contact with water or products that can cause skin irritation;
  • Exposure or contact allergy to metals such as cob alt, chromium or nickel;
  • Use of intravenous immunoglobulin.

Also, some studies report that excessive and constant sweating of the hands or feet, called hyperhidrosis, can also increase the risk of developing dyshidrosis. [1]

How the treatment is done

The main treatments for dyshidrosis recommended by the dermatologist include:

1. Skin care

Skin care helps to prevent blisters from forming or to prevent them from getting worse or becoming infected, and includes:

  • Applying cold compresses 2 to 4 times a day for up to 15 minutes at a time, or soaking your feet or hands in cold water to reduce discomfort or the itch;
  • Use warm water when washing your hands;
  • Apply moisturizers indicated by the doctor that promote the restoration of the skin's protective barrier. These moisturizers should be used frequently and every day to improve dry skin;
  • Avoid contact with substances that may cause allergy or skin irritation.

Also, if skin routines are not enough to improve symptoms, the doctor may recommend the use of medication.

2. Use of medication

Treatment with medication is indicated by the doctor when skin care has not been enough to improve symptoms or in more severe cases of dyshidrosis, and includes:

  • Anti-allergy pills, such as diphenhydramine or loratadine, to help relieve itching and redness of affected skin
  • Corticosteroid creams, such as mometasone or betamethasone, applied to the affected skin in a thin layer to help reduce inflammation and dry the blisters, speeding their disappearance. This treatment can be done for up to 6 weeks, unless the doctor recommends longer according to the severity of the dyshidrosis;
  • Immunosuppressive cream, such as tacrolimus or pimecrolimus, prescribed by a physician when corticosteroid creams have not been effective in reducing symptoms or for people who are allergic to corticosteroids.This treatment can help prevent the appearance of blisters on the skin, however, as they have effects on the immune system, they increase the risk of skin infections;
  • Corticosteroids in tablet form, such as prednisone, for example, indicated when the use of creams with corticosteroids or immunosuppressants were not effective.

During the treatment, it is also recommended to make compresses or baths with potassium permanganate or 2% boric water, two to three times a day, until the lesions improve, in addition to performing adequate hygiene of the affected region. with soap and water, apply moisturizer 2 to 3 times a day and avoid coming into contact with substances that irritate the skin, such as cleaning products.

Also, for severe dyshidrosis that does not respond to previous treatments, your doctor may recommend other medications such as azathioprine, methotrexate, mycophenolate mofetil, cyclosporine, or etanercept.

3. Phototherapy

Phototherapy is a type of treatment performed in hospital by the doctor, which uses ultraviolet light on the skin affected by dyshidrosis, indicated in cases where other treatments have not been effective in controlling symptoms.

Ultraviolet light can be used together with an oral or topical remedy, psoralen, this treatment being called PUVA, which consists of taking or applying psoralen in the form of an ointment on the skin, and 2 hours then expose the area to be treated to ultraviolet radiation.

4. Botox

In more severe cases, the doctor may recommend injections of botulinum toxin, also known as botox, to decrease the functioning of the sweat glands, reducing excessive sweating, which is one of the causes of dyshidrosis.

5. Natural treatment option

A good home treatment to help soothe the symptoms of dyshidrosis is to use calendula compresses to complement medical treatment.Calendula is a medicinal plant that contains healing and soothing properties that help relieve intense itching and dry blisters.


  • 2 tablespoons of marigold flowers;
  • 200 mL of boiling water.

Preparation mode

Place the marigold flowers in a pan with boiling water and let it rest for 10 minutes. Then, strain and soak clean compresses in the mixture, applying them to the affected skin for 5 to 10 minutes. See home remedies for dyshidrosis.

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