Hair loss causes and treatments
Why am I experiencing hair loss?
What is the regular cycle of hair growth and loss? The standard cycle of hair growth lasts for 2 to 6 years. Each hair grows approximately 1 centimeter (less than half an inch) per month during this phase. About 90 percent of the hair on your scalp is growing at any one time. About 10 percent of the hair on your scalp, at any one time, is in a resting phase. After 2 to 3 months, the resting hair falls out, and new hair starts to grow in its place.
What causes excessive hair loss?
Some things can cause excessive hair loss. For example, about 3 or 4 months after an illness or a major surgery, you may suddenly lose a large amount of hair. This hair loss is related to the stress of the illness and is temporary. Hormonal problems may cause hair loss. If your thyroid gland is overactive or underactive, your hair may fall out. This hair loss usually can be helped by treatment thyroid disease. Hair loss may occur if male or female hormones, known as androgens and estrogens, are out of balance. Correcting the hormone imbalance may stop your hair loss.
Many women notice hair loss about three months after they’ve had a baby. This loss is also related to hormones. During pregnancy, high levels of certain hormones cause the body to keep hair that would normally fall out. When the hormones return to pre-pregnancy levels, that hair falls out, and the usual cycle of growth and loss starts again.
Some medicines can cause hair loss. This type of hair loss improves when you stop taking medicine. Medicines that can cause hair loss include blood thinners (also called anticoagulants), medicines used for gout, medicines used in chemotherapy to treat cancer, vitamin A (if too much is taken), birth control pills and antidepressants.
Certain infections can cause hair loss. Fungal infections of the scalp can cause hair loss in children. The infection is easily treated with antifungal medicines.
Finally, hair loss may occur as part of an underlying disease, such as lupus or diabetes. Since hair loss may be an early sign of a disease, it is important to find the cause so that it can be treated.
Norwood hair loss classification chart
As men progress through their twenties, given that there is no balding, the hairline assumes the “mature” look, with slight frontal-temporal recessions, which impart a concave appearance to the hair line on each side, with a lower peak in the middle. This is analogous to the number “II” Classification on the Norwood hair loss chart (right).
This is the most well-known of several systems for classifying degrees of baldness and was developed by Dr. O’Tar Norwood. This is a very useful scale for identifying one’s current degree of hair loss in a way that is acknowledged and understood by physicians in the field of hair loss treatment.
This “mature” hairline is not considered balding; the Norwood III is considered the first evidence of balding in androgenetic alopecia (male pattern baldness). In studying the Norwood charts, we see that usually the most advanced balding is known as a class VII. There are also Type “A” variants in which the forelock in the middle tends to recede along with the frontotemporal areas. Thus, there will be less overt crown loss than in the regular III, IV, and V patterns.
Can improper care of my hair cause hair loss?
Yes. If you wear pigtails or cornrows or use tight hair rollers, the pull on your hair can cause a type of hair loss called traction alopecia. If the pulling is stopped before scarring of the scalp develops, your hair will grow back normally. However, scarring can cause permanent hair loss. Hot oil hair treatments or chemicals used in permanents (also called “perms”) may cause inflammation (swelling) of the hair follicle, which can result in scarring and hair loss.
What is common baldness?
The term “common baldness” usually means male-pattern baldness or permanent-pattern baldness. Male-pattern baldness is the most common cause of hair loss in men. Men who have this type of hair loss usually have inherited the trait. Men who start losing their hair at an early age tend to develop more extensive baldness. In male-pattern baldness, hair loss typically results in a receding hair line and baldness on the top of the head. Women may develop female-pattern baldness. In this form of hair loss, the hair becomes thin over the entire scalp.
Is there any treatment for hair loss?
Depending on your type of hair loss, treatments are available. If a medicine is causing your hair loss, your doctor may be able to prescribe a different medication. Recognizing and treating an infection may help stop the hair loss. Correcting a hormone imbalance may prevent further hair loss.
Medicines may also help slow or prevent the development of common baldness. One medication, minoxidil (brand name: Rogaine), is available without a prescription. It is applied to the scalp. Both men and women can use it. Another medicine, finasteride (brand name: Propecia) is available by a prescription. It comes in pills and is only for men. It may take up to 6 months before you can tell if one of these medicines is working.
The only form of permanent hair restoration is hair transplantation surgery. Today’s ultra-refined follicular hair restoration surgery achieves a full and natural appearance for most patients.
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