I am a 16 year old guy who weighs only 88 pounds. I am 5'10" and I just can't seem to put on any weight. I eat constantly and no matter how much I eat, I get hungry really fast. And my stomach grumbles alot, and really loudly. I also have transposition of the great arteries, scoliosis, pectus carinatum (also known as pigeon chest), a heart murmur, and constant pain in my feet and arms. What should I do? Please help guys.