Please use a digital thermometer to check the temperature. If the temperature exceeds 37.5 persistently, that's fever. Please give paracetamol and take the child to the hospital for proper examination to know the cause of the fever. There are many causes of swelling especially involving the eyes. First, you need to rule out problems with the major organs like heart, kidney or liver... Also allergic reactions.... Kindly treat as urgent Kindly see a PAEDIATRICIAN for further evaluation and management