<s>[INST] My 11 year old son has been lightheaded and dizzy for a couple of hours. Has had some ringing in his ears. He played several hours of competitive soccer over the weekend in temperatures of 85-95 degrees. Body temp is normal. What might this be? He s nervous which makes us nervous because that s not normally like him. [/INST] Hi, welcome to HCM. Can understand your concerns. This could be due to hypotension, hypoglycemia or dehydration. Get the child examined by a doctor. </s>