Baldness or alopecia is a partial
or total absence of hair on the scalp. This condition commonly affects
men and less frequently women. It may be permanent or temporary, partial
or complete, slowly progressive or rapid.
A healthy scalp shed
old hair continually and new hair grows to replace them. Baldness
develops when new hair stops growing for any reason. It usually strikes
when a man is in his early twenties or thirties, and it will continue to
worsen until he is bald.
Common Type of Baldness:

• Male Pattern Baldness is the most common pattern, a man losses much or all of the hair over the top of the head.
• Female Pattern Baldness involves thinning of the hair but not complete baldness.
• Scarring alopecia – scarred areas from burns or other injuries may prevent the hair from growing back.
• Toxic alopecia  is
  a type of baldness that may occur following a high fever or severe
  illness. This condition is characterized by temporary hair loss. Certain
  medications, especially thallium, high doses of vitamin A, and some
  cancer medicine, may cause toxic alopecia. Medical condition like
  thyroid disease may also trigger toxic alopecia.

Causes of Baldness:

• Too much of vitamin A.
• Accumulation of oil or seborrhea on scalp and the blocking of pores where the hair follicles are located.
• Improper hair care increases the problem.
• Lack of adequate vitamins and proteins needed for hair growth.
• Excessive stress; cases like anorexia nervosa and malnutrition.
• Regular coloring and hair treatments.
• Hormonal imbalance
• Temporary hormonal imbalance that usually occurs after pregnancy.
• Teasing of hair and the use of pony tails.

Treatments for Baldness:
There is really no known effective treatment for Male-pattern baldness,
but if the baldness is premature or caused by some pathological
condition, treatment includes;

• Wash hair everyday with an
  aloe vera, avocado and jojoba based shampoo, massage the scalp gently,
  it will help open the pores and eliminate excess oil and dirt.
• Application of fresh aloe vera gel regularly nourishes the scalp and helps prevent the progress of hair thinning.
• Eat food rich in sulfur, biotin and omega-3 fatty acids.

Nutrients Your Hair Needs to Grow Well:

• Calcium panthothenate, pantothenic acid or vitamin B-5: These elements help hair to assimilate and utilize copper.
• Inositol & Choline – essential for hair growth
• Vitamin B-12 – helps in hair growth.
• Iodine – helps to keep hair from falling out.
• Iron and Manganese – helps hair growth and helps keep hair well nourished through good blood circulation in the body.
• Niacin – helps in the circulation of the blood.
• Proteins & Amino Acids
  – hair is made up of 98% proteins however if the vitamins and minerals
  mentioned are not present, the body cannot take advantage of these
  proteins.
• Zinc – important to keep hair strong.
• Brewer’s yeast – to keep hair healthy and natural

Aesthetic Procedure to Restore the Hair:

• Hair weaving – a technique in which the sides of the hair piece are sewn into the remaining hair.
• Hair transplanting – doctor surgically removes plugs of the scalp that contain growing hair. The plugs are then transplanted to the baldness.