I'm pretty sure you meant "stringy stuff in the drain after tummy tuck," not "tummy tuck in the drain." Can't help it; I raised a PhD daughter who is an English teacher! Your question reminded me of the sentence "We went to throw the horses over the fence some hay, and there they were, gone." But I digress.Yes, this is entirely normal! It is fibrin, the material that clots our blood. This is identical to the "glob" of blood that forms when you have a bloody nose, or collect blood from anywhere (such as a surgical drain).This is absolutely nothing to worry about! Air bubbles in the tube are also normal, and concern many patients, since they heard too many stories about air embolism. These bubbles are in the drain, not your bloodstream. The drain is doing its job, and your blood is clotting like it should. Carry on, and have a great result! Best wishes! Dr. Tholen