The third and fourth stages are known as telogen and exogen, respectively. In telogen, the hair is supposed to be at "rest" until it finally detaches itself from the follicle and enters the exogen or shedding stage. Once the hair is detached from the follicle, the follicle remains inactive for about three months, after which a new cycle begins again.
Certain medical conditions call for treatments and surgeries that help to cure the ailment. While these treat your condition, the side effects of the treatments can often damage the hair follicles and cause rapid hair fall. Treatments like chemotherapy to treat cancer, steroids, and medication for typhoid, heart diseases, depression, etc. are known to be responsible for extreme hair fall to the extent of causing baldness. Here’s a list of drugs that list hair loss as a possible side effect:
There are few scientifically proven and FDA-approved treatments for hair loss. There are thousands of unproven claims and products to help with hair regrowth. Many conditioners, shampoos, vitamins, and other products claim to help hair grow in some unspecified way. Nioxin has been a popular brand of shampoo for hair loss, but there is no compelling evidence showing it is any more effective than regular shampoos. These products are usually harmless but generally not scientifically proven and therefore potentially useless. To slow down hair loss, there are at least four potentially effective, basic options. These include medications like Minoxidil, and Propecia, which are for long-term use. Stopping these drugs does not seem to worsen or exacerbate the prior hair loss. The patient will simply revert to the state he would have been in had he never started treatment.
2. A strategic cut. Long, layer-free haircuts divert volume from the roots, making your part seem wider than it is, Scrivo says. Going shorter (than your current length — no need for a major chop) helps take weight off so hair can look fuller and bouncier. And layers that angle inward on the sides will build height and body at the crown. If you’re game to try bangs, Scrivo says, they lessen the amount of scalp that shows at the hairline.
The scalp contains a natural oil called sebum, which helps keep the skin lubricated. Sebum is produced by the sebaceous glands. Sometimes these glands work overtime and produce too much oil, leading to a greasy scalp. Greasy hair can look dull, limp, and lifeless, and it may be more difficult to manage. To treat greasy hair, try washing with a gentle shampoo that is specially formulated to control sebum.

Other causes for hair loss or hair thinning can be stress, illness, poor diet, hormone imbalance or your body going into shock. Certain diseases and intensive medical treatment such as chemotherapy are also likely to result in hair loss, but it is best to consult your GP if you go bald at an alarmingly fast rate, especially if you have no family history of male pattern baldness.
Another method is to wear a hat or a hairpiece—a wig or toupee. The wig is a layer of artificial or natural hair made to resemble a typical hair style. In most cases the hair is artificial. Wigs vary widely in quality and cost. In the United States, the best wigs—those that look like real hair—cost up to tens of thousands of dollars. Organizations also collect individuals' donations of their own natural hair to be made into wigs for young cancer patients who have lost their hair due to chemotherapy or other cancer treatment in addition to any type of hair loss.
When men have hereditary hair loss, they often get a receding hairline. Many men see bald patches, especially on the top of the head. Women, on the other hand, tend to keep their hairline. They see noticeably thinning hair. The first sign of hair loss for many women is a widening part. In rare cases, men see noticeably thinning hair. And in rare cases, women can see a receding hairline or bald patches. The reasons for this are unknown.
^ Jump up to: a b Blumeyer, A; Tosti, A; Messenger, A; Reygagne, P; Del Marmol, V; Spuls, PI; Trakatelli, M; Finner, A; Kiesewetter, F; Trüeb, R; Rzany, B; Blume-Peytavi, U; European Dermatology Forum, (EDF) (October 2011). "Evidence-based (S3) guideline for the treatment of androgenetic alopecia in women and in men". Journal of the German Society of Dermatology. 9 Suppl 6: S1–57. doi:10.1111/j.1610-0379.2011.07802.x. PMID 21980982.
Make improvements in your diet to reduce hair loss. If your diet lacks marine proteins, vitamins and minerals for hair growth, it can lead to damaged hair, thinning hair, and hair loss. Eat a variety of colorful, well-balanced foods, consult a dietitian or nutritionist, and if you think you are still not getting a good hair loss diet, try a vitamin supplement for hair loss such as Viviscal.
Any kind of physical trauma—surgery, a car accident, or a severe illness, even the flu—can cause temporary hair loss. This can trigger a type of hair loss called telogen effluvium. Hair has a programmed life cycle: a growth phase, rest phase and shedding phase. “When you have a really stressful event, it can shock the hair cycle, (pushing) more hair into the shedding phase,” explains Marc Glashofer, MD, a dermatologist in New York City. Hair loss often becomes noticeable three-to-six months after the trauma.
Losing your hair can be distressing, but if it is caused by thyroid disease it is most likely reversible. In the meantime, try to stave off further hair loss by treating your hair gently. Avoid brushing it excessively, using harsh coloring products, and hairstyles that pull on the hair (such as a tight bun). If you feel self-conscious about having thin hair or bald patches, consider wearing a scarf or wig while your hair grows back.
The Rogaine rep we spoke to explained that the different packaging (and therefore different prices) has to do with the FDA-approval process: “We discovered in clinical trials that the hair loss patterns between men and women are different,” she said by way of explanation. “Men typically have that bald spot on the crown of their head, where women generally have a general thinning throughout, but concentrated more on the top of the head. So for FDA approval, we had to come up with two different, gender-specific products, so the directions were more explanatory.”
Minoxidil: This medicine is applied to the scalp. It can stop hairs from getting thinner and stimulate hair growth on the top of the scalp. The U.S. Food and Drug Administration (FDA) has approved minoxidil to treat hair loss. It is the only hair re-growth product approved for men and women. A dermatologist may combine minoxidil with another treatment.
Medical conditions and medications. A common medical condition that also causes hair loss is hypothyroidism, which can happen in both men and women. Patients suffer from an underactive thyroid gland, which is responsible for producing the hormone, thyroxin, which performs important bodily functions, such as the regulation of body temperature, proper utilization of carbohydrates and fats, and production of protein. Since protein is an important nutrient for the production of keratin, inadequate protein supply in the body due to an underactive thyroid means that hair growth in the follicles is slow. In men especially, hair loss is one of the first signs of hypothyroidism.
Sudden weight loss is a form of physical trauma that can result in thinning hair. This could happen even if the weight loss is ultimately good for you. It’s possible that the weight loss itself is stressing your body or that not eating right can result in vitamin or mineral deficiencies. Loss of hair along with noticeable weight loss may also be a sign of an eating disorder such as anorexia or bulimia.
Laser devices: Brushes, combs, and other hand-held devices that emit laser light might stimulate hair growth. These devices might make hair look more youthful in some people. Because the FDA classifies these products as medical devices, the products do not undergo the rigorous testing that medicines undergo. The long-term effectiveness and safety for these devices are not known.
As a senior writer for Live Science, Laura Geggel covers general science, including the environment and amazing animals. She has written for The New York Times, Scholastic, Popular Science and Spectrum, a site covering autism research. Laura grew up in Seattle and studied English literature and psychology at Washington University in St. Louis before completing her graduate degree in science writing at NYU. When not writing, you'll find Laura playing Ultimate Frisbee. Follow Laura on Google+. 
Scalp reduction is the process is the decreasing of the area of bald skin on the head. In time, the skin on the head becomes flexible and stretched enough that some of it can be surgically removed. After the hairless scalp is removed, the space is closed with hair-covered scalp. Scalp reduction is generally done in combination with hair transplantation to provide a natural-looking hairline, especially those with extensive hair loss.

"Firstly, even the very good ones won’t get to the root of the issue - pardon the pun - and prevent or treat male or female pattern baldness which is caused by genetics, nor deal with hormonal issues at the heart of female hair loss. But they can help make the hair you do have stronger and healthier. And they can be useful in putting a hair loss regime in place, along with medication like Minoxidil or Finasteride and/ or a hair transplant.
Like a Ferrari production plant where luxury automobiles are painstakingly assembled from carefully crafted parts, hair growth depends on a number of carefully coordinated systems that work together. It’s no secret that supplements can have a positive effect on other parts of your body, such as your immune system and your heart. Can hair growth supplements have a similar effect on hair loss (androgenetic alopecia) to promote healthy hair growth naturally? Absolutely. In order to understand why, first it’s important to know how your hair grows.
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