But the side effects of tretinoin should be considered.

Function: When used to treat acne, it can shrink sebaceous gland tissue, inhibit sebaceous gland activity, reduce sebum secretion, reduce keratinization and keratin embolism of sebaceous gland epithelial cells in hair follicles, and inhibit the growth and reproduction of Propionibacterium acne. Recent studies have also shown that this drug can regulate the inflammatory immune mediators related to the pathogenesis of acne and selectively bind to retinoic acid nuclear receptors, thus playing a therapeutic role.

Side effects: 1. The side effects of this medicine are similar to the clinical manifestations of vitamin A overdose. Common side effects include dryness of lips and skin, cheilitis, desquamation, itching, pain, rash, increased skin fragility, peeling of palms and soles, ecchymosis and secondary infection. 2. Complicated with membranitis, severe corneal opacity, visual impairment, papilla edema, headache, dizziness, mental symptoms, depression and benign brain pressure increase; 3. Loose hair and soft nails; 4. Osteoporosis, muscle weakness, pain, gastrointestinal symptoms, nosebleeds, etc. 5. Medication during pregnancy can lead to spontaneous abortion and fetal malformation; 6. Laboratory examination can lead to rapid ESR, elevated liver enzymes, elevated blood lipids, elevated blood sugar and thrombocytopenia. Most of the above side effects are reversible and can be gradually recovered after drug withdrawal. The severity of side effects is related to dosage, course of treatment and individual tolerance. Mild adverse reactions do not need to be stopped or reduced, and serious adverse reactions should be stopped immediately and treated by doctors. Most of the above-mentioned adverse reactions are reversible and can be gradually recovered after drug withdrawal.