Hi Cheyenne, I am sorry to hear what you are experiencing. Chronic GVHD can occur at any point after transplant and commonly occurs in the skin, GI tract, lung and liver. Skin GVHD usually manifests as a rash, tightening of the skin and hyper or hypo pigmentation. This does not seem to be the case for you. I believe it is very common to loss muscle mass with the treatment that has been received in the past and it is very important to remain active and do weight bearing exercises when able. If GVHD is present in the GI tract, it could be difficult to gain weight. I would highly suggest to follow up with your bone marrow transplant team to make sure there is no GVHD or other cause for these symptoms. I hope this information helps.