You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

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It may be acute telogen effluvium. There can be many reasons of hairfall like intense illness, vitamin and mineral deficiency, stress, poor diet, pregnancy, lactation and many more. To rule out the cause and decide upon the treatment kindly video consult.