These are medical definitions of medical terms for hair loss dictionary that appear in the Hair Loss article.

    5 Alpha Reductase

    The 5 alpha reductase enzymes have been medically proven to convert the hormone testosterone into a super and much potent hormone that is Dihydrotestosterone.


    Alopecia is the most common type of hair loss affecting men and women all over the world even kids couldn't escape this type of hair condition, Alopecia. Alopecia is said to be the medical term used to identify the loss of hair from the head or even from the body. 

    Alopecia Androgenetic

    Alopecia androgenetic or androgenetic alopecia is an extensively prevalent disorder which affects both men and women. This unruly hair condition has been regarded to be occurring enormously in males than in females. Androgenetic alopecia is commonly known as the male and female pattern baldness.

    Alopecia Areata

    Alopecia areata is a condition that causes open patches on the human scalp or body. More and more medical specialists found out that this disease is due to autoimmune deficiency wherein white blood cells from the immune system attack the hair follicles and block them from producing more hair.

    Alopecia Senilis

    Alopecia senilis are known to be in occurrence in older people or this condition can occur due to old age in certain people. This type of hair loss is proven to be permanent. Hair loss experts or medical doctors have stated that alopecia senilis is caused by the slowing or delaying metabolism and a poor and inconsistent supply of essential nutrients to the hair follicles.

    Alopecia Totalis

    Alopecia totalis is thought to be a more severe and that it is a much harsher classification of alopecia areata, patches of hair loss on the scalp and other areas of the body can certainly occur whenever an individual experiences alopecia areata.

    Alopecia Universalis

    Alopecia universalis is a type of hair loss condition that has been proven to be showing an excessive loss of hair on the human head and body. A loss of hair on the head, in the nose, armpits and even all over the entire body is prominent in a single person who is suffering alopecia universalis.

    Androgenetic Alopecia

    Androgenetic alopecia can occur predominantly in males which show off a visible pattern on their scalp. A receding hairline starts to progress, displaying an “M” shape or a horseshoe pattern and a gradual thinning of the hair at the center or the crown area. Androgenetic alopecia is certainly thought to be as a natural circumstance and is not considered as a disease.


    Androgens are commonly classified as steroid hormones. Testosterone is the most essential androgen in the body of all men although there are said to be several different types of androgens. Each androgen manages one or even more aspects of masculine maturation and function.  Androgens do not just control the male characteristics but these hormones do also exist and can be active as well in females.


    Antiandrogen pills or drugs efficiently block the receptors on the prostate cancer cells that are sensitive to the androgen hormones. By blocking these receptors or also known as the androgen receptors, the cancer cells are hindered from further progression thus, making the cancer cells incapable of enlarging and multiplying.

    Amino Acid

    Amino acids function essentially in the human body. Amino acids play a major role as building blocks of proteins and increase fat metabolism. There are over 20 kinds of amino acids from proteins, lengthy chains of amino acids unite in order to shape up to 55,000 different proteins and each protein is utilized to produce the enzymes, neurotransmitters, and hormones that sustain natural growth and as well support the adequate functions of all organs of the human body including the brain, kidneys, heart, liver and sex organs.

    Asymmetrical Hair Loss

    Asymmetrical hair loss is somehow similar to male pattern baldness. Most men endure some extent of asymmetrical hair loss in their lifetime. This type of hair loss happens when one side of a person’s hairline starts to bald but the other does not. Although, this frequently restores itself and the other side catches up but in some rare cases it simply continues until one side of the hairline is completely bald and the other still remains. Asymmetrical hair loss in some instances can be caused by both telogen effluvium and androgenetic alopecia.

    Azelaic Acid

    Azelaic acid is an antibacterial and antiproliferative agent that has anti inflammation properties. This is extensively used for the treatment of various skin disorders including mild to moderate acne and rosacea.


    Catagen stage is then the gland stops and decreases the release of sebum.


    The cortex layer of the hair shaft is the cuticle. The cuticle serves as a protection to the cortex and this is seen as a colorless and thin layer. There are pigment cells that are distributed throughout the cortex and medulla giving the hair its distinctive color.

    Club Hair

    Club hair is assembled when the catagen phase occurs. It is when the portion of the hair follicle in contact with the lower part of the hair becomes attached to the hair shaft. This entire process cuts the hair off from its blood supply and from the cells that produce new hair.

    Cyproterone Acetate

    Cyproterone acetate is a type of hormone therapy drug which is also commonly known as an anti androgen. The main purpose of hormone therapy for prostate cancer is to decrease or halt the body to make testosterone thus, the therapy also blocks testosterone from reaching the cancer. This therapy can eventually shrink and delay the cancer.

    Dermal papilla

    The dermal papilla is situated at the base of hair follicle. The dermal papilla contains nerves and blood vessels which supply glucose for energy and amino acids to make keratin. Glucose is provided by the cells of the dermal papilla to the hair follicle, this process is essentially needed for the production of amino acids and energy accumulation. This sustenance permits the body to produce new hair.


    Dermatology is the study of diagnosis, treatment and prevention of skin problems of the skin, nails and hair. Dermatologists are doctors who diagnose and treat conditions and diseases of the skin such as fungal infections, acne, eczema (scaling skin, itching), skin cancer, psoriasis, birth-marks, warts, moles, tinea, contact dermatitis and other rare skin diseases

    DHT (Dihydrotestosterone)

    Dihydrotestosterone or  DHT is said to be one of the primary reasons for hair loss.  Since women produce male hormones too but of small amounts only, they are also prone to developing androgenic alopecia.


    Finasteride is an orally administered medication that is designed to act as an androgen antagonist. An anti androgen like finasteride acts in restraining the activity of androgens at the receptor sites. This drug specifically inhibits type II 5-alpha reductase, the enzyme that converts the hormone testosterone to a very potent androgen hormone dihydrotestosterone (DHT)


    A follicle is a sac from which a single hair grows and into which the sebaceous (oil) glands open.  There are hair follicles all over the skin of the human body.


    Minoxidil was originally formed as a tablet; it was proven that unwanted hair growth came to be the interesting side effect. Researchers and medical practitioners were encouraged and decisive to produce a topical minoxidil solution for treating hair loss.


    Medulla is the inner most layer of the hair shaft or is the central zone of cells present only in large, thick hairs. The medulla is composed of large and loosely conjoined cells that are keratinized.


    M.P.H.L is an abbreviation of male pattern hair loss which is a condition that causes the hair to fall out in a particular pattern spreading from the top of the head. M.P.H.L is the most common type of hair loss in men all over the world.

    Male Pattern Hair Loss

    Male pattern hair loss is an extremely prevalent disorder affecting men at some stage. Men who are in the age of 20 to 50 are said to be bothered by this devastating condition. It typically takes 10 to 20 years to go bald.


    Micropigmentation is also called permanent makeup, this type of physical enhancement targets the lashes, eyebrows and lips while it’s also often used to improve conditions such as uneven pigmentation and scarring.

    Retin-A or Tretinoin

    Retin-A medication is to provide a mild exfoliation or perhaps a chemical peel that accelerates the process of natural exfoliation and improves the production of collagen.

    Saw Palmetto

    Saw Palmetto works as an active antiandrogen which is seemingly similar of how a finasteride targets DHT in the body and in the scalp. Saw palmetto alleviates DHT level in our body by preventing 5 alpha-reductase thus, reducing the development of DHT, which causes hair loss.

    Scalp Makeup

    Scalp make up for hair loss sufferers is a really unique and fast way of visibly making the hair look denser and volumized. Typically, a scalp make up comes in a powdered cosmetic that is applied directly to the areas on the scalp where hair thinning or hair loss is apparent and this is created with one of a kind brush like structure which incredibly camouflage or mask the appearance of thinning hair or hair loss.

    Scalp Reduction

    Scalp Reduction surgery involves the removal of a bald portion of the human scalp, and stretches the remaining skin up and over the area that is being removed. This technique crucially moves the hair on the sides of the human scalp up to the bald portion.

    Synthetic Hair

    Synthetic hair is a material which seems to have similar look of a human hair but is totally created from non human components. Synthetic hair is generally known as fake hair, wigs and hair extensions.

    Seborrheic dermatitis

    Seborrheic dermatitis is a common inflammatory skin condition that develops flakes of gray, and white to yellowish scales to form usually on oily areas or areas where sweat glands are sufficient such as the scalp, in the folds of the skin like the armpits and neck area and even inside the ear.

    Terminal hair

    Terminal hair comes from a large hair follicle. It is a developed hair which appears to be coarser, thicker, darker, and longer than the shorter and finer vellus hair.


    Testosterone is a steroid hormone from the androgen group. It is the principal male sex hormone and this is secreted in the testes of men and the ovaries of women.

    Telogen Effluvium

    Telogen effluvium is a type of hair loss that normally results from stresses such as physiological stress. It is considered to be a temporary hair loss which is due to shedding of resting or telogen hair after some breakdown to the system.

    Telogen Phase

    Telogen is commonly known as the resting stage. When the hair follicles begin the process of telogen phase, which halt the production of hair, the follicles throw away their final cells on to the end of the fiber.

    Traction Alopecia

    Traction alopecia is a type of hair loss caused by damage to the dermal papilla and hair follicle by frequent pulling over a long period of time. This condition is typically apparent in people who style their hair tightly that pull and exert great tension on the scalp, specifically on the hairline that results in the hair shaft to crush and ejects the hair from the hair follicle.

    Vellous hair

    Vellus hairs are hairs that are short, light-colored found on the bodies of infants, children and adults. Vellus hairs are easily recognized by their small size; they are usually less than 2mm (1/13 inch) long and the follicles are not connected to the sebaceous glands.

See more Hair Loss Terms in our Hair Loss Articles