Tianqidan used it for a while and the barrier was damaged.

The ingredients of Tianqi Danhua water emulsion contain retinol, which can relieve dry skin and play a role in hydrating and moisturizing. However, retinol is a photosensitive component. If you don't get enough sun protection after using it during the day, your skin is likely to turn black and yellow after ultraviolet radiation. Therefore, after using Tianqi Danhua water emulsion, you must be careful to apply sunscreen and do a good job of sunscreen to avoid melanin accumulation and blackening the skin.

Tianqidan water emulsion set contains a certain amount of pigment, which can be reflected in the ingredient list. If women don't apply it evenly during skin care, it is very likely that the skin will turn black and yellow after being absorbed by the skin.

Different skin types may also cause the skin to turn black and yellow. Tianqidan is mainly suitable for people with dry skin. After oily skin is used, it may increase skin oil secretion, leading to oil accumulation, which will turn the skin black and yellow over time.