Itchy like pins and needles on the back, this condition may be a result of an allergic reaction, the most common may be the emergence of hives or pruritus, etc., all due to allergic factors. So when you encounter this situation, you may generally need to carry out anti-allergy treatment, generally in the treatment can be appropriate oral anti-histamine drugs. For example, you can take oral levocetirizine hydrochloride or loratadine, or epinastine and so on. Of course, if the itching is obvious, it can also be appropriate with the first generation of antihistamines, such as oral paracetamol or cyproheptadine, ketotifen and so on. You can also take oral Chinese medicine, such as oral moistening and anti-itching capsule or oral anti-feng and tong shen granules, as well as oral gentian and liver pills. While using these medications, you should also try to avoid local scalding, and avoid using some alkaline bath products.