Hello, I can understand your concern. As the baby already had cold and could before injury, it is possible that he is having upper respiratory tract infection which is causing fever. As the age of the kid is not mentioned, it is not possible to advise medicine or dose here. Alternatively, if he has bruised himself internally or externally, an infection may have developed due to injury that can cause high fever. In any case, it is advisable to visit a physician or pediatrician for the examination of the child and needful treatment. I hope this answer helps you. Thank you for trusting HCM with your concern. I wish your child feels better soon! Best, Dr. Viraj Shah