does make some children tired and sleepy. After giving paracetamol
the fever is bound to reduce and your son will become active. I suggest you get your son examined by a doctor to find the likely cause of fever.
Mosquito bites do become itchy and swollen. To prevent mosquito bites kindly take steps to control the mosquitos. You may use mosquito repellents and better still make your son wear full sleeve shirts and trousers/pyjamas to reduce the mosquito bites.
Wishing your son a speedy recovery.