Hair loss is typically considered the domain of aging men, but this equal-opportunity condition — which has many causes — can affect virtually anyone.
Everyone sheds about 100 hairs each day as part of the normal hair growth cycle, but excess loss is usually a distressing development.
Symptoms & causes
Most people’s hair grows about a half-inch per month, and about 90 percent of your hair is actively growing at any given time, with the other 10 percent in dormant phase. After two or three months, this dormant hair falls out and its follicles begin growing new hair as other follicles begin a dormant phase
Shedding hair is different from hair loss, when a hair falls out and doesn’t grow back. People often shed hair during stressful events, such as childbirth, a breakup or divorce or during times of grief.
Alopecia is the medical term for hair loss, and it doesn’t only happen on the scalp. Some illnesses and medications can trigger balding over the entire body, though genetics account for most cases on the head
Aside from heredity, noticeable hair loss can be caused by wide variety of factors, including:
1-Harsh hairstyles or treatments
2-Hormone imbalances
3-Illness or surgery
4-Medications and vitamins
5-Nutritional deficits:
6–Aging
Diagnosis
Dermatologists will examine the person’s scalp and take a history of medical or stressful events
The dermatologist may take a biopsy — a small patch of skin that includes the hair follicle — and send it to a pathologist to determine if an autoimmune disease, such as lupus, is the cause of the hair loss.
Examining the hair and follicle can also determine whether someone has a bacterial or fungal infection
