There is a very high risk of self-deployment of ointments to treat skin diseases, especially when chemicals are involved. The following is the important information I must emphasize： **1. It is absolutely forbidden to use chemicals by yourself** -Antibiotics (such as clindamycin), hormones (such as hydrocortisone), antifungal agents, etc. Need to be used strictly in accordance with the doctor's instructions. The wrong ratio can cause： * Damage to the skin barrier, aggravating the condition * Drug resistance has emerged, and there may be no drugs available in the future *Systemic toxic side effects (such as Cushing syndrome caused by long-term hormone abuse) **2. Possible serious consequences** -Chemical burns (such as corrosion caused by excessive salicylic acid concentration) -Allergic reactions (such as Stevens-Johnson syndrome caused by sulfonamides) -Cross-infection (sterile production cannot be achieved in the home environment) -Delay formal treatment (such as mistaking psoriasis for eczema and missing the optimal intervention period) **3. Safe alternative** *Immediate action recommendations：* -Record the details of symptoms (site/morphology/duration) and seek medical attention as soon as possible -For temporary relief, you can use refrigerated sterile saline wet compress -Choose a medical dressing with the same font size (such as a repair cream containing hyaluronic acid) **4. The truth about natural ingredients** Even if you use aloe vera or honey： -It is necessary to ensure that the raw materials are free of pesticide/microbial pollution -Natural and safe (if the concentration of tea tree oil exceeds 5%, it will burn the skin) -Irreplaceable medical diagnosis (may mask the symptoms of malignant tumors) Please stop the self-made drug plan immediately. Skin diseases may be caused by fungi, bacteria, viruses, autoimmune and other complex factors. Diagnosis can only be made through professional methods such as dermatoscopy and pathological biopsy. Your health deserves more scientific treatment. It is recommended to make an appointment with a dermatologist within 72 hours.