impossible to gain weight???!!!

hi. i have been tyring to gain weight for what seems like forever but i cannot even manage to put on a single pound. i also have a lot of digestive issues, so i am guessing that my digestive problems are whats causing me to stay at the same weight. Could it be that my body is just not obsorbing any of the nutrients i put into it?? what can i do to make it so my body is able to absorb nutrients like it is supposed to??? i will do anything!!! thanks! Tweet