Extreme Weather Change and Hair Loss

I am 24yrs old female and last night my husband spotted a bald spot on back left of my head. Its about a quarter size n pink in colour and it still has 3-4 hair in that area. Now i am worried about this as this was not their long ago. I had been living around in different environment like extreme hot and cold as i was an air hostess. And i am an indian. Reason for telling you all this is my husband asked one of his friend and she told him that one of the reason can be the weather initially in hot weather and now in cold areas. Please suggest me something. Can this be rectified. i want my hair to grow fast. Please suggest me something.

Weather does not cause hair loss. We have something called asynchronous hair growth, which means that hair does not shed, but grows throughout the year. Animals will shed in the summer and grow hair in the winter. If you have lost hair in a spot on your scalp, the two most common causes are alopecia areata and ringworm. You will need a good doctor to evaluate it.