Tests for eczema usually require blood tests. After taking a medical history, the doctor will first examine the skin rash. In order to further clarify the cause of the disease, the doctor will recommend the patient to undergo routine blood tests, allergens and immunoglobulin E tests, and if necessary, the patient will be recommended to undergo a skin biopsy. Eosinophilia and increased serum eosinophilic cationic proteins can be found in routine blood tests, which can be used to confirm the diagnosis of eczema and the next step of treatment. Eczema is usually treated with topical medications, removal of possible causes or allergens, systemic medications, and physical therapy. If the diagnosis of eczema is confirmed, it is recommended to go to the hospital as soon as possible and under the guidance of the doctor to carry out standardized treatment in order to reduce the adverse effects of the disease.