<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi, my 18-month old has a bite or sting on his left arm, and it seems to be getting better, but now he has ring rings around his legs. about 4 or 5 on his right, and 2 or 3 on his left. it doesnt feel raised or dry, but its been there for a couple hours. what could be the cause of it? should i take him to a doctor?  <response>: Welcome to the ChatDoctorIn my opinion your child is suffering from an allergic reaction known as hives. It seems to be due to the insect sting. It occurs commonly due to release of histamines in body in response to the sting. If your child is not having any respiratory problems, then you can follow the following measures:1. Apply calamine lotion over lesions as they are itchy and uncomfortable for the child.2. Give him an antihistamine like Spy. Ben Chat Doctor. 3. Cold compresses at sting site. In case it worsens, or the child develops breathing problems, then do contact your pediatrician immediately. For further questions, do contact us. 