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In females the most common cause of hair loss is –iron deficiency
imbalance, thyroid problem, stress,after delivery, lack of sleep, familial ,or use of chemical on scalp ,procedures like perming or straightening etc. Other rare causes are zn & copper def. One has to find the exact cause of hair loss and treat. In females there are various patterns of hair loss,which can be judged clinically by a dermatologist
.You should get your hormonal level checked along with an ultra sound
if necessary to rule out PCOD.This usually seen in obese patient with irregular periods
. Other simple test which we do are hair pull test and trichogram to diagnose which type of hair loss is there.
As you said that you have patches of hair loss..then it would mean that you have ALOPECIA AREATA
...which is a autoimmune disorder.The treatment of choice is injection intralesional..along with topical therapy.
After proper diagnosis you can start with topical preparations like Minoxidil
2%-5% applied twice daily on scalp along with tab biotin one daily.Other hormonal medicines are also available if needed.
Improve your diet with green leafy veg, fresh fruits, plenty of water, sprouts ,pulses, high protein diet, avoid items with high sugar content like sweets & chocolates, less of Chinese foods, less of pizza & burgers ,more of milk & ghee, dry fruits . Good sleep also has a important role to play . Consult a good dermatologist for proper diagnosis.