One capsule a day of Aviva capsule is not harmful, but prolonged overdose may cause redness, dryness and other discomforts. Avian a capsule belongs to a kind of retinoic acid, is a kind of vitamin a derivative, this kind of drug can have more obvious treatment effect on the skin keratosis pilaris. Aviva capsule has the function of regulating the differentiation and proliferation of epidermal cells, stopping itching, etc., and has a better therapeutic effect on the discomfort caused by erythrodermic psoriasis, pustular psoriasis, as well as other keratosis pilaris and other diseases. If oneself blindly use Avi a capsule, it may cause itching, dry mouth, back pain, arthralgia and other adverse reactions, renal insufficiency, pregnant women and lactating women are prohibited to use. When using Avi a capsule, it should be used under the guidance of a doctor, avoid using it blindly to avoid discomfort.