The main cases of pimples and itching are as follows: First, if you have a flat rash, like the flat bumps caused by mosquito bites, and it goes away from time to time, meaning that it goes away again for a while, but it may go away again in other parts or the same part, this situation is called hives. Hives are also allergic in nature, and are associated with food and drug allergies, for example. There are also infections, such as tonsillitis, pharyngitis, periodontitis and gastroenteritis, which are all related. Secondly, the situation that causes skin bumps and itching cannot be ruled out as eczema. The rash of eczema manifests itself as symmetrically distributed erythema and papules and is accompanied by significant itching, eczema is also an allergic problem. Therefore, when treating eczema, you should avoid spicy and sweet foods as well as hairy items such as fish, shrimp, crab, beef and mutton. In addition, the bathing water temperature should not be too hot, and when it is itchy, you can apply topical glyburide and take oral loratadine for anti-allergy treatment.