My son has been sick off & on for 6 years, ever since he left the service. He suffers from severe back pain & tinnitus. Also off & on he can t sleep, can t eat, late afternoon fever, bone shaking chills, sweating, vomiting, his eyes sink in, extreme weight lose, dehydration, chest pain and v fib. The VA told him they were out of ideas and to google his symptoms, then let them know what he finds out.