1. Periostracum Cicadae is a kind of traditional Chinese medicine, also called periostracum Cicadae, which is sweet and salty in nature and somewhat cold. It has the functions of dispelling wind and heat, clearing away heat and penetrating rash, improving eyesight, expelling wind and stopping spasm. It is used for some wind-heat colds, throat pain at the beginning of epidemic febrile diseases, measles, rubella itching, red eyes, acute and chronic convulsions and tetanus. Because cicada slough has the functions of clearing away heat, dispelling wind and penetrating hair, cicada slough was a very commonly used medicine for penetrating measles in the past, which was used for children with initial measles rash. In recent years, the number of measles patients has gradually decreased, and now cicada slough is rarely used to penetrate the rash, but more used to treat some skin diseases and throat cough diseases.

2. Modern pharmacological research shows that cicada slough has immunosuppressive and antiallergic effects, and can also relieve the spasm of bronchial smooth muscle. Now it is often used to treat asthma, urticaria, dermatitis and other diseases related to allergic reactions, and cicada slough is often used. Clinically, cicada slough has been reported to treat cough, pharyngitis, dumb, itchy skin, urticaria and insomnia.

3. The contraindication of cicada slough is that pregnant women should take cicada slough carefully.