Hello, I am at my wit's end and hoping this "thing" as we call it may ring a bell with someone who can help me. My 15 1/2 year old son has had this reoccurring illness for the past 2 1/2 years. We have had many many blood tests and nothing can be found. He will be totally fine, then either at night or when he wakes up in the morning , he is exhausted, very fatigued, will develop a headache, some joint pain, not as hungry but does eat and some digestional issues. Hard to concentrate. Basically lies on couch and watches tv. This thing lasts 4 to 5 days and after that he feels totally normal again. He is a kid who is home every day after school. He is not overtired. It is different. Its not Lyme, mono, blood counts are good etc. We are currently working with a pediatric rhumotologist at a very good hospital. Sometimes it has occurred every 3 to 6 months. This past year he has been sick 5 times since September. There seems to be no rhyme nor reason when he gets sick. Has anyone experienced anything similar?? Thank you.