hi! welcome to health care Magic Forum.
Severe hair loss in females is usually due to anemia
imbalance .Other rare causes are low serum iron
level,zn def, protein def,crash dieting,improper eating habits ,improper sleeping habits etc.You should get your investigations done first and then go treatment.But in any case there are few medicines which you can start like Mintop
2% topically over scalp twice a day.Start taking iron tablets as well.You can also take biotin(5mg) daily.Keep your diet good like take lot of green leafy vegetables,high protein diet,plenty of water,fresh fruits ,sprouts ,and a good 7 hr sleep.Consult a dermatologist
and ask him about things i've mentioned .take care .