When purchasing cosmetics, note the following:
1. Beware of photosensitizing agents in cosmetics, which can trigger inflammatory reactions when skin is exposed to sunlight.
2. Certain synthetic chemicals, such as dyes and fragrances, may irritate skin, causing itching or neurodermatitis.
3. Cosmetics containing heavy metals like lead, chromium, molybdenum, or cadmium can be absorbed by the skin, accumulate in the body, and cause toxic reactions.
4. Avoid excessive use of oil-based cosmetics, as their oils attract airborne dust, clogging sweat glands and hair follicles. This promotes bacterial growth, leading to folliculitis and acne.
When removing makeup, use makeup removers:
1. After applying foundation or colored cosmetics like lipstick, eyeshadow, or blush—regardless of whether the makeup is heavy or light.
2. After using sunscreen or primer (especially products with skin-tone correcting properties).