It can be due to dandruff which can be due to internal or external causes.
Dandruff can cause either an overly dry scalp with itchy white flakes that may be waxy or greasy, or it can manifest as an oily scalp with scales.
Internal causes include hormonal imbalance, poor health, poor hygiene, allergic hypersensitivity, lack of rest, emotional stress, excessive consumption of sugar, fat or starch and heredity predisposition.
External causes include excessive use of hair sprays and gels, improper use of hair-coloring products, cold weather and dry indoor heating, infrequent shampooing of the hair or inadequate rinsing of the scalp and hair.
Dandruff is associated with a tiny fungus called Pityrosporum ovale, or P. ovale for short. This fungus lives on our bodies and scalp all the time, usually without causing a problem. Unfortunately, for some people, it can get out of control -- leading to dandruff.
Ask your son to eat a healthy diet. He can also take vit B6 and vit A and E which are good for hair and skin. Try medicated shampoos for dandruff. There are a number of over-the-counter shampoos available that can help. The most effective ingredients -- antimicrobials -- to look for are zinc pyridinethione, selenium sulfide, sulfur and ketoconazole (also available by prescription). If his hair is colored, don't use products with selenium sulfide or sulfur.
If the symptoms persist please consult a trichologist for the confirmatory diagnosis and treatment.
Hope it helps.Take care and pls do keep me posted on how your son is doing or if you have any additional queries.Warm regards.
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