The Various Methods of Hair Removal

First, Understanding Hair Growth
If we know how hair grows it will help us understand how to keep our hair from growing. Each hair is contained in a pilosebaceous unit, which consists of a hair shaft,  a hair follicle, sebaceous gland, and erector pili muscle. Hair growth and shedding is a continuous cycle through 3 phases. The anagen phase is the growth phase, the catagen phase is a transitional state, and the telogen phase is the resting phase. Hairs spend a different amount of time in each phase determined by genetics, hormones, and area of the body. Hair in the anagen phase is more susceptible to injury than hair in the telogen phase. All of these factors must be considered when choosing a method of hair removal.

Bleaching
Although it's not actually a hair removal method,  rather a way to make the hair less noticeable. This is especially useful for areas that already have thin but dark and therefore noticeable hair like the arms, face, or neck. Bleaching is performed by applying a chemical to the desired area, which removes the pigment from the hair.

Shaving
Shaving is the most temporary method of hair removal because it only cuts the hair off at the skin surface. Shaving does not make the hair shaft thicker, darker, or grow faster or slower. However, the short hair shaft may be more noticeable as it grows out because it has a blunt tip instead of the normal tapered tip. Before shaving your legs, apply some type of moisturizer to the skin to help the razor glide over the skin, not cut or scrape it. Common moisturizers include water, shaving cream, hair conditioner, or body wash.

Plucking - Physical Hair Removal
Plucking hair with tweezers is one effective way to remove hair but it can be very time consuming. The hair shaft must be long enough to grasp with tweezers.

Waxing - Physical Hair Removal
Waxing is one nore effective method of removing large amounts of hair at one time. In this method wax is warmed to allow it to be spread easily over the skin in the direction of hair growth. The hair becomes embedded in the wax, which cools and firms up grasping the hair. The wax is then quickly pulled off in the opposite direction of the hair growth, pulling the hairs out of the follicles. Cold waxes are available usually attached to strips, which are patted onto the skin. Wax that is still left on the skin must be peeled or scratched off. hot wax should be used with caution.

Laser Hair Removal
As the most popular method today, laser technology has become more understood. Hair removal is a common application of laser technology, Contrary to popular belief, it is not permanent and not for everyone. Lasers work by emitting light at various wavelengths, energy output, and pulse widths. The wavelength used determines the skin structure it will affect such as veins, melanin, or water. Most lasers used for hair removal target melanin and are therefore designed to burn structures that contain melanin. The more melanin, the more damage. It makes sense that laser hair removal works best for light-skinned people with dark hair. As with electrolysis, hair follicles in the anagen phase are more easily destroyed than those in the telogen phase. Therefore, laser treatments for hair removal must be repeated. At this time it appears that laser treatment, while not causing permanent destruction of all hair follicles, does retard the regrowth of new hair.

Depilatories Hair Removal

Depilatories use a chemical called thioglycolate mixed with sodium hydroxide or calcium hydroxide to literally melt the hair away. Thioglycolate disrupts disulfide bonds, which are chemical bonds that hold skin and hair cells together. The disulfide bonds that hold hair together contain more of the protein cystine than do the disulfide bonds that hold skin cells together. Thioglycolate is more effective on disulfide bonds that contain cystine. The major side effect of a depilatory is skin irritation because the chemical can melt away skin cells.
A depilatory is applied to the area with unwanted hair and left on for 3 to 15 minutes. During this time the chemical dissolves the hair and the resulting jelly-like substance is wiped or washed off after the appropriate time. The chemical should be tested first on a small skin area at least 48 hours before applying it to a large area. Applying a hydrocortisone cream after hair removal may help decrease irritation.

Electrolysis Hair Removal

This particular method involves inserting a fine needle into the hair follicle and applying an electrical current to the follicle root. This procedure actually burns the hair root theoretically preventing it from producing more hair. Each hair follicle must be treated individually and may take several treatments to destroy the follicle. Electrolysis is a permanent form of hair removal but it has several drawbacks. First, there are no standardized licensing guidelines for electrolysis so finding an experienced, effective technician is difficult requiring talking to clients who have experienced permanent results. Second, this method requires repeated treatments for up to 12 to 18 months. Hair follicles that are in the telogen phase are more difficult to destroy than hair follicles in the anagen phase. Shaving approximately 3 days before an electrolysis treatment ensures that the hairs that are visible are in the anagen phase. Finally, side effects can include pain, infection, keloid formation (for people who are susceptible), hyperpigmentation, or hypopigmentation.