(See also Overview of Dermatitis.)
Certain drugs (especially penicillins, sulfonamides, isoniazid, phenytoin, and barbiturates) may cause this disorder. In some cases, it is a complication of other skin diseases, such as atopic dermatitis, psoriasis, and contact dermatitis. Certain lymphomas (cancers of the lymph nodes) and other cancers, such as leukemia, may also cause exfoliative dermatitis. In up to 25% of people, the cause is unknown.
Exfoliative dermatitis may start rapidly or slowly. At first the entire skin surface becomes red and shiny. Then the skin becomes scaly, thickened, and sometimes crusted. The top layer of skin, the epidermis, falls off over large parts of the body. Sometimes the hair and nails fall out. Some people have itching and swollen lymph nodes.
Although many people have a fever, they may feel cold and have chills because so much heat is lost through the damaged skin. Large amounts of fluid, electrolytes (such as sodium, potassium, and calcium), iron, and protein may seep out. The damaged skin is a poor barrier against infection, so the skin may become infected by bacteria.
Doctors base the diagnosis of exfoliative dermatitis on the person's history and the results of a physical examination.
If symptoms of exfoliative dermatitis are similar to those of a skin lymphoma (mycosis fungoides), doctors send samples of skin to the laboratory to rule out lymphoma as a cause.
Early diagnosis and supportive treatment of exfoliative dermatitis are important in preventing infection from developing in the affected skin and in keeping fluid and protein loss from becoming life threatening.
People with severe exfoliative dermatitis often need to be hospitalized and given antibiotics (for infection), fluids and salts (to replace those lost through the skin) by vein (intravenously), and nutritional supplements. Care may include the use of drugs and heated blankets to control body temperature. Cool oatmeal baths followed by applications of petroleum jelly and gauze may help protect the skin. Corticosteroids (such as prednisone) given by mouth or intravenously are used only when other measures are unsuccessful or the disease worsens.
Any drug or chemical that could be causing exfoliative dermatitis should be stopped or avoided. If lymphoma is causing exfoliative dermatitis, treatment of the lymphoma is helpful.