Q18 When is a hair transplant unsuitable?

There are absolute and relative contraindications, requiring preoperative assessment. Common examples include poorly controlled hypertension or diabetes, abnormal clotting or anticoagulant use, active scalp infection or inflammation, a history of local-anesthetic allergy, serious cardiovascular or cerebrovascular disease, pregnancy or breastfeeding, a tendency to abnormal scarring, clearly insufficient donor reserves and rapidly progressing, unstable hair loss. People with HIV, HBV or HCV infection may also undergo hair transplantation if routine blood tests are normal and viral levels are undetectable or extremely low, although the operation may pose occupational exposure risks to medical staff.