My 7 year old son has complained recently when he had a headache that his leds felt wobbly.  Now he seems to have a cold with a low grade fever and again is complaining that his legs felt weak...earlier he also complained that his back hurt.  Is this just body aches associated with being ill or reason to be more concerned?
Welcome to the ChatDoctorIt seems that your son is suffering from a self limiting viral illness which are prevalent in this age group. Don't worry, they just need symptomatic management and improve with in a few days. You may give him acetaminophen or ibuprofen for fever and body ache. An antihistamine such as Chlorpheniramine or fexofenadine will help him in cold. If he has sore throat then go for a throat swab culture to rule out streptococcal infection. Also, warm saline gargles will be helpful. Give him regular feeds and oral fluids to prevent weakness and deny Chat Doctor. Hopefully this will help you. I would be happy to help you out in any future health related questions. Take care