I think the term u mean is telogen effluvium .Its nothing but thinning of hair and hairfall . Main cause of this is stress and poor dietary food habits. High level of vit A is very very rare and I don't think u have its overdose but it's deficiency leading to telogen effluvium. If this is not ur problem then contact me further to clear ur doubts
Answered2018-02-03 14:27:53
Let others know if this answer was helpful