if you can get an oil called durvadi kerathailam, ask him to apply a little bit on his scalp
(not only the hair) 15- 30 mins before taking his bath every day. do not use any shampoo. with in two days the itching should stop. but continue it for three weeks. if he gets cold
, stop the oil and once his cold is gone, continue the oil. only little oil is necessary. just use enough so that it wont be oily after bath.
hope i was helpful