External Factors:
1.Heavy makeup: pigments in cosmetic and residues of harmful substances in the skin surface or deep in the skin will cause the pigment accumulation.
2. Bad cleaning habits: spots is creeping into face, it is because a lot of products can damage skin, and prolonged exposure without the cleansing of the skin.
3. Does not focus on the sunscreen: skin wrinkles and blemishes are mostly caused by photo-aging, pigmentation spots will form over time.
4. Long time in front of computer: computer radiation can cause facial acne, radiation spots, dryness and gloomy, eye vision problems, black eye, there for it is also important to anti radiation.
5. Excessive whitening: excessive whitening can hurt skin increasing the chances of dark spots growth.
Internal Factors:
1. Pressure: When the human under the pressure can secrete the adrenalin, the human body metabolism balance can be destructed, the nutrition supply which the skin needs tends to be slow, the chromoblast can become very much active.
2. Hormonal imbalance: birth control pills that contain estrogen estradiol, stimulates the secretion of melanin suppressors cells and form uneven spots, spots formed due to birth control pills, which although will stop after a break, will still remain on the skin for a long time.
3. Slow metabolism: the metabolism of the liver does not function properly or ovarian dysfunction can also reduce spots.
4. Genetic: those whose parents have spot have high probability to get spot.