Took son, 15 years old ,to Dr yesterday for his check up and he he has a one painless lump behind ear bone left side about 1" maybe slight less, they said it was lymph node, his blood pressure was 85/55 and his pulse was 83. Said his blood pressure was normal He has lost weight , 4lbs and is complaining of being chronic tired. Sleeping 8 hours a day, trying to gain weight but can't, eating healthy. Recently starting lifting weights and working out complains that his ears feel like they need to pop when working out. He had Nuss procedure for concave chest chest (bar is out now, and he is fine) he had been exposed to multiple chest xrays due to this. His uncle on his fathers side has Non- Hodgkin. They did a metabolic blood test yesterday, waiting for results, said they would call if anything abnormal shows up, and want to see him him in 6 weeks. Hearing was fine, ears were fine, vision worse in right eye, The blood pressure seems low and the pulse high but is that normal for a 15 year old boy? Is there a non serious explanation of symptoms? What should I be concerned about?