Yes. It is normal to have hair fall out in small amounts as each follicle has a life cycle. Additional causes of hair loss are changes in diet, hormone fluctuation, allergy to products, bodily trauma, illness and medication can all cause loss of hair.
People typically lose 100-150 follicles each day. Healthy follicles that remain in tact and unimpeded regenerate after the hair has fallen out. A typical person has roughly 150,000 hair follicles on their head.
Medical conditions that can cause hair loss include thyroid disease, alopecia areata (an autoimmune disease that attacks hair follicles), and scalp infections likeringworm. Diseases that cause scarring, such as lichen planus and some types oflupus, can result in permanent hair loss because of the scarring.