Psoriasis, also known as psoriasis, with red lumps on the body that do not flake, may be psoriasis, or it may be caused by conditions such as hives, ringworm, or connective tissue diseases. Psoriasis is an immune-mediated, chronic, relapsing, inflammatory, systemic disease induced by a combination of genetics and the environment. The course of the disease is usually slow, difficult to treat, and prone to relapse, with a certain degree of heredity. The rash caused by psoriasis is mainly manifested as red patches and plaques on the skin. Therefore, the appearance of red patches of skin without flaking may be an early manifestation of psoriasis. In addition to this, skin disorders such as erythema annulare, contact dermatitis, urticaria, drug dermatitis, lupus erythematosus, and ringworm caused by fungal infections may lead to the appearance of red patches on the skin with or without flaking. The appearance of red patches on the skin, it is recommended not to blindly use drugs to avoid skin irritation or cover up the condition, it is recommended to go to the hospital dermatology department to find the cause.