By Ayurvedic point of view ,your son has problem of Disturbance or imbalance of Vata Dosha.
Ayurved has a special treatment of Panchakarma
by which problems related with sense centers can be treated accurately.Nasya(putting few drops of medicated oil or home made ghee in nostrils) is a good treatment for ur son.
Nasya should be done regularly at evening or before sleeping.
For your more information, this problem have astrological solution also.