Could exercises that many doctors are recommending to increase the looseness of the scalp, when performed for a long time, cause any problems ( e.g. traction alopecia ) ?
Scalp exercises are used to increase the laxity to the scalp, as shown in this video:
As long as you are pushing down on the scalp and not creating constant pull 24 hours a day, you should not have traction alopecia from this. Traction alopecia occurs when you keep your hair pulled or braided too tight constantly over the course of many months. Traction alopecia and scalp exercises are two different things.