Immunocompromised patients may go to the Department of Nutrition, Department of Rheumatology and Immunology, Department of Hematology, etc. according to the accompanying other symptoms and in conjunction with the medical history. 1. If there are symptoms such as weight loss, emaciation, unresponsiveness, fatigue, lack of energy, dry skin, edema, etc., and the usual diet is irregular, food intake is too small, or there is a history of chronic diarrhea, chronic peptic ulcer, etc., malnutrition is usually suspected, and can go to the Department of Nutrition for consultation. 2. If there are typical symptoms such as fever, painless ulcers of the oral mucosa, butterfly-shaped erythema on the face, alopecia or baldness, as well as muscle and joint pain, headache, fatigue and other symptoms. Or if you usually take estrogenic contraceptives for a long time, or are often exposed to ultraviolet rays, etc., SLE is usually suspected, and you can go to the Rheumatology Department for consultation. 3. If there are symptoms such as pale skin and mucous membranes, dizziness, tinnitus, poor concentration, memory loss, lack of appetite, muscle weakness, etc., and there is a history of gastrointestinal bleeding, recurrent viral infections, recurrent nosebleeds, or ecchymosis and petechiae all over the body, then hematological disorders are suspected, and consultation with the Department of Hematology is needed. Immunocompromise can also be caused by other diseases. Patients can choose the appropriate department in the hospital according to their symptoms and cooperate with the doctor to do relevant examinations to find out the cause of the disease and receive treatment as soon as possible.