There are many types of hair loss; some types are temporary and some are permanent. Identifying the type of hair loss someone is experiencing will help determine if the hair loss is permanent and whether it is treatable. Most cases of hair loss are due to genetics, and are treatable if caught on time.
The average person loses about 50-100 hairs a day. This is normal. While there is no set number of hairs for determining an abnormal amount of hair loss, if someone starts noticing a large amount of hair on their pillow or comb, they should consult a physician. This is especially the case if they start experiencing bald patches or thinning hair which can be the signs of an underlying medical condition. There are many types of hair loss (also known as alopecia). Hair loss can be classified into two categories: cicatricial (scarring) alopecia and non-cicatricial (non-scarring) alopecia.