What will happen to the hair if one is to smoke marijuana 3 days after FUE HT?
I would not recommend smoking anything for at least the first week, as your body is healing after transplant. You decrease the amount of blood flow and oxygen that goes to the grafts, which can lead to poor graft growth. We don't yet know the effect of marijuana on hair growth, and you just made a big investment! It's not worth the risk.
I agree with Dr. Rassman -- there are no studies so we can't tell you for sure. What I can tell you though is that anything that may make you cough will increase the pressure in your scalp and could potentially dislodge the grafts. You are making a big investment in your hair -- don't screw it up!