Dry hair occurs when the sebaceous glands produce too little oil to keep the surface of the hair supple and shiny. Dry hair looks dull and brittle, and often feels rough to the touch; it often splits easilt and loses elasticity.
Dry hair may be caused artifically, from overprocesing and overheating, from too much sunlight, too much perming and bleaching, or overfrequent washing.Dry hair has little natural protection and regular conditioning is essential. A weekly deep moisturizing treatment is recommended to keepdry hair in good condition, and ends need regular trimming to avoid splitting.
Oily Hair
Oily hair generally goes hand in hand with oily skin. It is due to overproduction from the sebaceous glands, which coats the hair with excess oil and makes it lank and lifeless within a day or so of washing. The grease attracts dust, sooily hair needs frequent washing. Use a mild shampoo if you wash your hair daily, as the hair requires a certain amount of natural oil if it is to stay healthy and elastic. Hair may become more oily during times of illness or stress. Only comb or brush it when necessary, and do not play with the hair or rub the scalp, since this only stimulates thesebaceous glands.
Normal Hair
Normal hair is as much the result of good luck as is is careful treatment. It has a natural gloss and shine and feels soft and smooth to the touch. Always use mild shampoos and conditioners, and at the first sign of any problems, take the necessary steps to protect your hair.
Combination Hair
This type of hair is oily at the scalp and dry at the ends. It occurs more in oily long hair that has damaged ends. It can also occur to people with dandruff as the oil soaks into the dry flakes on the scalp instead of travelling along the hair shaft. Use a mild shampoo and condition the ends of the hair only, leaving the scalp free from this type of treatment.