The palms are covered with a subcutaneous rash, the skin is peeling and the hands are burning like from nettles, what is it?

Judging by the description, this is dyshidrotic eczema or dyshidrosis. You should definitely visit a dermatologist to get the right treatment. Do not self-medicate. Before going to the doctor, be sure to wear gloves when in contact with water and detergents (rubber outside, inside - cotton or rubber with a non-woven coating inside).

dermatologist-cosmetologist in the group of clinics "Altermed"

Hello!

This is how eczema manifests itself. The reason may be a complex of factors: from stress, regular contact with an allergen to metabolic disorders.

It is important to approach treatment comprehensively. It is important to consult a doctor in time so that he can determine the stage of the disease and correctly prescribe the treatment.

It is also necessary to determine the internal cause of the disease.

Be sure to limit contact with water and detergents. Gloves will help with this, it is advisable to use cotton gloves, and rubber on top.

More details can be found in this article https://www.altermed.ru/dermatology/eczema/