Neck and armpit itch can be seen in normal people, but also may be caused by contact dermatitis, mosquito bites, etc., this kind of people should consult a doctor in time to clarify the cause of the disease after treatment. 1. Physiological conditions: normal people will have neck and armpit itch when wearing tighter, non-breathable clothes, should try to wear well-fitting, breathable cotton clothing, generally no special treatment. 2. Contact dermatitis: neck and armpit itch may also be caused by contact dermatitis, before the onset of contact with pollen, animal hair and other substances, it will also have neck and armpit rash, oozing, blisters, available antihistamines such as loratadine for treatment. 3. Mosquito bites: neck and armpit itch may also be caused by mosquito bites, mostly in the summer mosquito more, can be used locally glycerite, compound menthol ointment for treatment. Neck and armpit itch may have other reasons, it is recommended to exclude physiological conditions to the hospital in a timely manner, clear reasons, follow the doctor’s instructions for treatment, the above drugs should be used under the guidance of a doctor.