It is a constitutional disorder and not a disease. Ultra-violet rays are invisible rays. Their action is both chemical and germicidal.

In the human body these rays produce changes in the chemistry of blood and also stimulate activity of the blood cells. Ultra-violet rays increase resistance to disease by increasing the iron and vitamin D contents and the number of red and white cells in the blood.

They also help in the elimination of waste products, restore nutrition where needed, stimulate the circulation and improve the flow of blood and lymph. The slightest obstruction will hinder ultra-violet rays from reaching the skin. Consequently the skin must be cleansed before being subjected to these rays. The long exposure to ultra-violet rays tends to increase the fixation of calcium in the blood. These rays are not only destructive to bacteria but to tissues as well, if the skin is allowed to remain exposed for too long.

Average exposure may produce redness of the skin and overdoses may cause blistering. Skin tanning is the result of exposure to ultra-violet rays which stimulate the production of pigment or colouring matter in the skin. Sunburn may be produced by ultra-violet rays. For cosmetic purpose, first degree burns are suggested. Over exposure produces third and fourth degree burns. Ultra-violet rays are also used for acne, seborrhea and for fighting dandruff. They also promote healing and the growth of hair.

HOME REMEDIES

1 – Yellow mustard should be mixed in milk and applied to the face at night. It should be left untouched over night and then thoroughly washed the next morning.

2 – Take turmeric and sesame seeds in equal quantity. Grind them in water and apply.

3 – Grind the leaves of tulsi in water and apply this paste to the face.

4 – Mix a tablespoon of milk-cream with few drops of lime juice and apply on freckles every night before you go to bed.

5 – Mix one tablespoon of finely grounded oatmeal, one tablespoon of milk and few drops of almond oil into a paste and apply to a clean skin. Leave it on the face for 15 minutes then rinse off.