Three red spots with blisters grew on the forearm

There are three red spots with blisters on the forearm. The first consideration is that they are caused by mosquito bites. At this time, you can apply essential balm, toilet water, etc. If the itching is severe, you can take antipruritic drugs. If it is caused by bacterial infection and dermatitis, It can be treated with external application of erythromycin ointment.