Thank for writing your query.
Common causes of hair fall
Nutritional, anemia, diet & weight loss
lifestyle- hassled lifestlye with stress, increased work pressure, lack of sleep.
First approach to hair fall treatment is to try to find out what is the exact cause & than eliminate the cause.
Since you had mentioned that you develop itching on the scalp it is possible that you are either allergic to the hair spray or dandruff
might have got aggrevated.
Try to lead a healthy lifestyle.
Have a high protein balance nutritious diet.
Maintain proper scalp hygiene.
Proper hair oiling & massage
Good night sleep should take care of your hair fall problem.