Hi Relax. Any temperature above 37.7 `C is to be called fever. For fever, give Acetaminophen (Calpol) in a dose of 15mg/ kg/dose every six hours. Since your child is 13 kg, he will need approximately 200mg per dose. For most of fever, this alone is sufficient. If fever does not subside at all and child is irritable etc, to give comfort to kid, you may also give 1 or 2 doses of Ponstan in a day. Do not give both the drugs very frequently. It will do more harm than good. When he has fever, just remove few clothes off his body so that he will feel comfortable. After fever comes down You may dress him up fully. If he is not shivering, you may also give him tepid sponging with tap water in normal temperature. Tonsillitis in many cases are viral. Unless pus points are seen, there is no need of antibiotics. Since you have already started antibiotic this time too, continue it for a minimum of 7 days. What was the throat culture report? If suggestive of bacterial infection, antibiotics will be chosen based on the sensitivity report. Complete the entire course. If tonsillitis is recurrent, have a word with ENT specialist too. And Common cause of Oral Thrush in kids is usage of Bottles that are not sterilized well. If so, stop bottle feeds. Apply the mouth paint as recommended, atleast for a week. These oral lesions may also interfere with his feeding. Give him fluids like milk, juice, soups, porridge etc by a spoon. For the nappy rash, apply the barrier creams and keep the area open. Do not use nappies till it heals completely. Hope my answer helps you. Wish a speedy recovery for your kid.