A rash like prickly heat on the neck may be contact dermatitis, prickly heat, etc., to address the cause of the disease, symptomatic treatment. 1. Contact dermatitis: contact dermatitis is an inflammatory skin disease caused by contact with external allergies or irritants, mild symptoms can be coated with glucocorticoid drugs, such as hydrocortisone cream, dexamethasone cream, etc., and oral antihistamine such as loratadine. In severe cases, oral prednisone and other drugs are needed. 2. Prickly heat: In summer, high temperature or humid environment will affect the sweat discharge and prickly heat will appear. You can apply glycerine lotion or prickly heat powder, and for pustules, you can use Huanglian Puff Powder. The room should be kept cool and ventilated, and you should bathe frequently and dry off as soon as possible after bathing to keep the local skin fresh and clean. Rash like prickly heat on the neck is recommended to go to the hospital for examination, according to the cause of the symptomatic treatment, the drug should be used in accordance with the doctor’s instructions.