Itchy rash usually clears up in about 1 week to 3 months, but it is impossible to generalize due to the variability of individual patients. The cause of itchy rash has not been clearly defined and may be due to nerve irritation, allergic reactions, insect bites, food allergies, and poor hygiene practices. Patients may present with localized, windswept papules accompanied by marked itching and other symptoms. If it is acute simple itchy rash, there is the possibility of self-healing, avoid scratching, most patients can be good in about 1 to 2 weeks. Some patients with more severe symptoms may recover in about 2 weeks to 3 months, but there is a possibility of recurrence, so it is impossible to generalize. Once patients are diagnosed with itchy rash, they need to actively cooperate with doctors to take relevant treatment measures to avoid delaying the condition.