- Freckle
Most of them are round or oval sesame-sized spots, with a smooth surface, mostly concentrated near the nose, darkening after sun exposure, light in summer and dark in autumn and winter.
Cause of formation
Freckles are mostly hereditary, and there are also cases of intergenerational inheritance
Sun exposure can trigger or worsen spots
- Sunburn
Dark brown or light brown rice grain size, mostly on the outside of the forearm, the back of the hand, the front of the calf and the face
Cause of formation
Radiation from sun exposure or electronic equipment
- Chloasma
Mostly brown or dark brown patches of uneven size with sharp edges and irregular shapes
Cause of formationExternal factors: UV light damage to the skin
Internal factors: related to endocrine and hormonal factors
- Pregnancy spots
Mostly appear during pregnancy, distributed on the cheeks, forehead, showing a butterfly shape
Cause of formation
Elevated progesterone and estrogen during pregnancy
Causes melanocytes in the skin to be more active