I am having persistent pain by the side of armpits and on back (in the lungs region). The pain is actually very slight pain. I don't have any cough and moreover I did a chest pain view x ray 2.5 months ago and the report was absolutely normal. But this pain is still there and it's persistent (doesn't increases with deep breath or anything). I did not face any weight loss or fatigue or anything. Why is the pain still there? Which doctor shall I consult? Is it cancer? Please help me I am getting worried.