The cuticle is thin and colorless and serves as a protector of the cortex. Structure of the hair root Below the surface of the skin is the hair root, which is enclosed within a hair follicle. At the base of the hair follicle is the dermal papilla. The dermal papilla is fed by the bloodstream which carries nourishment to produce new hair. The dermal papilla is a structure very important to hair growth because it contains receptors for male hormones and androgens. Androgens regulate hair growth and in scalp hair androgens may cause the hair follicle to get progressively smaller and the hairs to become finer in individuals who are genetically predisposed to this type of hair loss.
When wearing a wig for the first time it is really important that you build your confidence. It may sound like a strange analogy, but it's a bit like wearing in a new pair of shoes. They always feel a bit uncomfortable the first couple of times you wear them, but after a short while, they mould to fit your feet (still talking about shoes there). A new wig will always feel rather strange at first and it does take a little time to get used to. Try wearing your hair around the house to help you become more accustomed to the way it looks and feels. At first you will do a few double takes when you walk past a mirror! But soon it will become more comfortable and you will relax more.
Ringworm can show small round or oval patches of alopecia and be very similar to AA to look at. Traumatic hair loss, breakage and scaling can be brought on by itching of the scalp and/or hairdressing mishaps, both painful and distressing. Trichotillomania is a condition, not widely known, because those suffering would not wish the loss of hair and the sparse regrowth to be seen. It is a habitual pulling of hairs from the scalp that can be very distressing for the person themselves and the family around them.
Losing one's hair can be a rather traumatic experience, and only certain types of hair loss can nowadays be treated successfully.There are various types of hair loss. Hairs can fall out from the entire scalp, from the region of the forehead or in patches from the crown of the head.
Diffuse alopecia is a type of hair loss that is seen in both men and women. With men it is difficult to determine with respect to the androgenetic alopecia. Diffuse hair loss tends to affect the whole scalp, rather than specific areas of it. It can occur at any age. The first signs are of increased hair loss which is followed after a while by recognizable thinning of the hair.
The human body is completely covered with hair follicles, except on the palms of the hands, soles of the feet, genitals and lips. Hair follicles are pouch-like tubes of skin cells that contain the hair root. Most follicles are tiny and many of the hairs they produce do not grow long enough to protrude from the pore.
Hair is made mainly of a protein called keratin. The only living part of the hair is the root (sometimes known as the bulb), which is anchored to the base of the follicle. The follicle supplies oxygen and nutrients to the root, and lubricates the hair shaft with an oily substance called sebum.
Hair is in a constant cycle of growth, rest and renewal – it is natural to lose some hair each day. Hair grows in phases, with around one in ten head hairs ‘resting’ at any given time. The colour, curl, length, thickness and amount of hair depend on genetic factors.
Dihydrotestosterone, also known as “DHT,” is an incredibly potent androgen found in the human body, primarily in males. DHT is a byproduct of the male hormone testosterone. While testosterone is critical for male development and masculine characteristics, it is susceptible to the effects of an enzyme found naturally in our bodies called 5-alpha reductase (5AR). When this enzyme reacts chemically with testosterone, a chemical conversion occurs that transforms testosterone into DHT. DHT attaches to androgen receptors in the scalp, which can shrink the hair follicle and eventually lead to the hair follicle dying off and falling out. While there is always some naturally occurring DHT in the body, excess levels of it cause hair loss by attacking genetically susceptible hair follicles in the scalp, as well as causing prostate problems for men. These side effects can occur at any age, but become particularly prevalent as males become older.
Hair does not really serve any important function since a person can certainly live without it! Yet, our hair and how it looks is a very important part of our self-image. So when a child loses their hair, it is a disturbing event for both youngster and their parents.
The registry has been established by the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), a part of the National Institutes of Health (NIH). The new registry will be located at the University of Texas M.D. Anderson Cancer Center in Houston, with affiliated centers at UCSF, the University of Colorado, University of Minnesota, and Columbia University.
Hair loss during adolescence can mean a person may be sick or just not eating right. Some medications or medical treatments, like chemotherapy treatment for cancer, also cause hair loss. People can even lose their hair if they wear a hairstyle that pulls on the hair for a long time, such as braids.
"Medical treatment and changing hair practices are critical for stabilizing disease and preventing progression of these hair loss disorders. However, existing hair loss has devastating psychosocial consequences on affected patients and is not addressed by those measures. While, historically, blacks have been shunned away from hair transplant procedures because of the challenges of hair harvesting and concern about the risks of hypertrophic and keloidal scarring, with use of proper techniques in appropriately selected patients, hair transplantation allows us to do something positive to improve appearance for these suffering women," said Dr. Callender, clinical assistant professor of dermatology, Howard University College of Medicine, Washington, and in private practice in Mitchelville, Md.
People with the condition called trichotillomania feel compelled to pull out their hair. The effects are seen on both the scalp and the upper eyelids. In the affected areas there are hairs of different lengths. When looked at under the microscope they show fractures.
When you think of hair loss, what image comes to mind? If you're like most of us, it's probably not a picture of a healthy woman -- but by the age of 50, over 50 percent of women are experiencing some hair loss. And believe it or not, the solution isn't as simple as a bottle of Rogaine. In fact, there actually four types of hair loss common in women, each with its own appearance, causes, and treatments. We spoke to Matt L. Leavitt, MD, a board-certified dermatologist and author of Women and Hair Loss (www.womenandhairloss.com), for some insight:
Spencer David Kobren vividly remembers the day he saw the light. Or to be more precise, the day he saw a little telltale patch of white.
It was Dec. 31, 1986. Kobren was 22. He knew his life had changed irrevocably. "It was devastating, man," he says, his tone mournful and anguished. "I felt like I was losing a limb. Once you cross that line, there's no going back."
His hair, lush and dense as a tropical forest, was starting to disappear. So began an odyssey to restore what time and genetics were slowly robbing. Kobren tried lotions made of keratin and potions infused with amino acids. He tried hanging upside down. He consulted psychics. He tried zapping his noggin with electrical charges, wrapping it with hot towels, rubbing it with cayenne pepper, shooting it up with hormones. He spent years and thousands of dollars on a fruitless, hairless quest.
The hair follicle is a structure that encases the lower part of the hair shaft. Each follicle contains blood vessels that nurture new hair growth. All hair follicles are present at birth; throughout the lifetime each follicle grows and sheds single hairs in a repetitive cycle (show figure 1). The growth phase for a single new hair lasts two to three years. At the end of this time, growth ceases and the follicle enters a resting phase. After three to four months in the resting phase, the hair is shed and the next growth cycle begins. On a normal scalp, approximately 80 to 90 percent of follicles are growing at any time. Each day, about 75 follicles shed their hair while the same number enter a new growth phase.
Folliculitis decalvans, also known as alopecia folliculitis or acne decalvans, is an inflammatory reaction in hair follicles on the scalp that causes redness (erythema) and pus-filled blisters (pustules). It leads to scarring and permanent hair loss.
Traction alopecia occurs as a result of improper hair care and prolonged use of certain hair-styling techniques. Cosmetic treatments (e.g., dyes, tints, bleaches, permanents) are generally safe; however, if treatments are done incorrectly, or if the chemicals are used for too long, the hair becomes brittle and breaks easily.
Hairstyles that pull the hair tightly, and excessive shampooing or brushing can also cause hair loss. Braiding, permanents, excessive heat, and hair straightening cause hair shaft weakness. Hair styling techniques such as hair weaving, corn rowing, and the use of hot combs to straighten hair can cause permanent hair thinning and scarring.
Everyone loses some hair every day. Losing up to 100 hairs a day is normal.
But if hair loss runs in your family, you could lose a lot more hair. Over time, you may end up with bald spots or hair that slowly gets thinner. About half of all people have this type of hair loss by around age 50.1, 2
Other factors, such as diseases and medicines, also can cause you to lose more hair than normal.
Although hair loss is fairly common, it can be a tough thing to live with, especially when it changes how you look. But there are ways you can treat your hair loss.
Hair loss can occur from many causes, including aging, illness, infections, scalp conditions, stress, hormone changes, and medications. Hair loss can also occur with HIV.
There are additional reasons that hair loss may occur with HIV besides the virus itself. Many medications used to treat HIV can cause hair loss.
People with HIV are susceptible to a wide variety of viral, bacterial and fungal infections. Such infections can involve the scalp, causing hair loss. The infections can also involve other organs, stressing the body. Premature aging can occur with HIV, resulting in accelerated graying of hair and hair shedding.
Changes to hair on the scalp. Many women notice that the hair on their head is thicker during pregnancy. Many lose a lot of hair a few weeks or months after delivery. These changes are normal. Hair growth generally returns to its regular growing cycle within six months after delivery.
When you're not pregnant, the hairs on your head grow in a regular cycle.
During pregnancy, hairs tend to stay in the resting phase longer. And much more of your hair is in the resting phase at any one time. Therefore, fewer hairs fall out each day. This causes your hair to seem thicker and fuller.
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