Psoriasis medically refers to psoriasis, and psoriasis is effectively treated with medications such as Avitamin A and methotrexate. Psoriasis is an immune-related chronic relapsing inflammatory skin disease, typically characterized by well-demarcated erythematous plaques or plaques covered with silvery-white scales. Patients with psoriasis are effectively treated with oral medications such as Avitamin A and methotrexate. 1. Avicenna: Avicenna can promote the proliferation and differentiation of epidermal cells, and play a role in the treatment of psoriasis. Before taking Avicenna, it should be noted that it is forbidden for people with liver and kidney insufficiency, pregnant women and lactating mothers, people with high blood lipids, people with excessive vitamin A, and people who are allergic to vitamin A and its metabolite, and itchy skin, dryness, dizziness, earache, nausea and other adverse reactions may occur during the process of taking Avicenna. 2. Methotrexate: Methotrexate is a kind of folate reductase inhibitor, mainly through the inhibition of intracellular enzymes, to achieve the purpose of the treatment of psoriasis, need to pay attention to before taking, the methotrexate ingredients are allergic to the person, pregnant and lactating women, the existence of immunodeficiency syndrome, systemic failure and other patients are prohibited. Stomach discomfort, fatigue and loss of appetite may occur during administration, and prolonged application may lead to serious side effects such as severe liver damage and reduction of red blood cells, white blood cells and platelets. All of the above drugs have adverse reactions, it is recommended to use under the guidance of a doctor, not blindly self-medication to avoid adverse effects. There are other therapeutic drugs for psoriasis, so it is recommended that patients consult a doctor in a timely manner and choose the appropriate medication under the doctor’s guidance.