Dense small rashes on the neck are considered to be caused by contact dermatitis, eczema, prickly heat, etc., and need to be used according to the different causes of the disease, the use of relevant drugs to get rid of. 1. Contact dermatitis: mainly for skin contact with certain exogenous substances, resulting in patients with localized skin pinpoint size dense papules, severe can also lead to erythema swelling obvious. For patients without ooze, glycerine lotion can be used to relieve itching and other uncomfortable symptoms; in addition to the use of topical glucocorticoid drugs, such as hydrocortisone ointment, halomethasone ointment and other drugs for treatment, which can play a role in relieving the inflammation; for the symptoms of the serious, oral antihistamine medication, such as benadryl. 2. Eczema: is caused by a variety of internal and external factors of the superficial dermis and epidermal inflammation, which can lead to localized pimples phenomenon. Clinically, the main use of glycerite lotion external coating for itching, but also with glucocorticoid drugs, such as dexamethasone ointment, halomethasone ointment, etc. for treatment; if the systemic symptoms are serious, but also the use of antihistamine medication, such as loratadine, cetirizine and so on. 3. Prickly heat: It is a superficial, inflammatory skin disease common in summer and hot environment, which can lead to small pimples and blisters on localized skin. Can be applied externally cool astringent drugs, such as glycerine lotion, prickly heat powder, etc.; itching serious patients, oral antihistamine drugs for treatment, such as loratadine, cetirizine and so on. All of the above drugs should be used in accordance with the doctor’s instructions, and it is recommended that patients go to the hospital in a timely manner and follow the doctor’s instructions for treatment.