 [ Symptoms ] experiencing fever cold sweats chills fatigue burning eyes and a deep pain in my mid section [ Disease ] without more information such as your son is age current weight amount of lost weight and specific eating habits it is difficult to say why he is losing weight children can lose weight during illness with high amounts of activity without an adeqaute diet when skipping meals and eating a diet that is low in fat and calroies the best thing to do is to pay a visit to his pediatrician where he or she can look at your son is growth pattern and see if there is indeed a problem from there you may get a referral to a pediatric dietitian who can help you troubleshoot his diet get the help you need