These changes can at times be a contributing factor in hair loss. But in order to treat this problem, we first need to figure out the root cause of it so that the apt treatment method can be suggested. We list 10 common reasons for hair loss in females. #1 Bad hair etiquette. Excessive use of hairstyling tools like strengtheners and curling iron or hair products like gels, mousse, sprays, colours, etc. can damage the hair shaft and prolonged usage can hamper its growth.