Psoriasis, or psoriasis vulgaris, is an immune-related chronic relapsing inflammatory skin disease. Moderate consumption of kelp by people with common type psoriasis is generally not associated with adverse health effects. Psoriasis vulgaris is genetically susceptible and is usually caused by genetic and environmental factors. Patients should not consume seafood and spicy stimulating foods, as the stimulating substances may cause the disease to recur and cause damage to the body. Kelp belongs to edible algae food, containing calcium, iodine, iron and other elements, patients with psoriasis vulgaris moderate consumption is conducive to the supplementation of trace elements in the body, but kelp is also high in salt, so it is not recommended that patients consume too much. In daily life, patients with psoriasis vulgaris should avoid skin irritation, avoid prolonged outdoor exposure to the sun or bathing in excessively hot water, and eat more fruits, vegetables and other light and balanced diet. If the patient’s condition recurs, it is recommended to go to the hospital for treatment in a timely manner to understand the causes of the recurrence of the condition, and take treatment measures according to the actual situation under the guidance of the doctor.