They did a study in cancer patients with medicinal marijuana and found smoking the right amount does alleviate a lot of the chemo symptoms, the nausea and general pain factors, however, if more than is prescribed is smoked the symptoms will actually become a lot worse. So if you don't go over the top and smoke more than is neccessary to get a decent high, probably will make you feel better. If you get stoned out of your mind, you'll probably feel worse.