Three quick questions narrow down the most likely cause of itching, flaking, hair loss, redness or oily scalp — with safe self-care advice and clear medical-referral thresholds.
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When to see a dermatologist immediately
Sudden severe pain, swelling, or fever
Pus, oozing, or crusting that does not improve in 7 days
Bald patches that grow rapidly or spread
Severe itching disrupting sleep or daily life
Any symptom in children under 12
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Important disclaimer: This tool provides general information only. It is NOT a medical diagnosis and does not replace professional advice. Persistent or severe symptoms should be evaluated by a dermatologist. Provided by Sawai Gyoseishoshi Office (Gyoseishoshi = certified Japanese administrative procedures professional).