编辑同志:我儿子的头皮长了些白色的斑块,帮他清洗也没有多大作用,去医院看,医生说是长了头癣,给我们开了外用药膏和口服药,口服药要求吃好几个星期。我有点疑惑,脚癣都是用外用药治疗的啊,头癣为啥就要口服药,外用药治不好吗?贵阳李××李读者:头癣是真菌侵犯头皮毛发而引起的感染性皮肤病。临床上可分为黄癣、黑癣和白癣三种,其中自癣最为常见。头癣多见于儿童,成人较少 Edit comrades: my son’s scalp longer white patches, help him clean also did not have much effect, go to the hospital to see, the doctor said is the first ringworm, opened us topical ointment and oral medication, oral medication required to eat several Week I am a bit puzzled, athlete’s foot are treated with external medicine ah, why tinea capitis should oral medication, external treatment is not good? Guiyang Li × × Lee readers: Tinea capitis is a fungal invasion of the skin caused by the scalp of infected skin disease. Clinically divided into yellow ringworm, black ringworm and white ringworm three, of which the most common since ringworm. Tinea capitis more common in children, adults less