Fever in 5 year old boy. Baby is active!

Ok mam actually my child is active in between days as well as in fever days also he is playing watching TV and not crying everything else is fine but only concern is in last 2 months since March he had got fever 4 times each times fever lasting 4-5 days and then completely down no other symptoms baby is active in between also and in fever days also when give zifi 100 and paracetamol the fever resolve and completely healed in 4-5 days but why is he getting fever 4 times in last two months first he got in 1 march when given the above medicine the fever resolve and went completely on 5 march then again 20 march it appears and resolve on 24 march then again back in 5 April and resolve in 3-4 days and today also he is having fever but given the above medicine and he is in fully relief but please tell why he is having reapted fever I had explain everything in detail because I am not doing online transactions hope you will answer here besides fever everything is fine baby is active