Not always. In fact, massage can be very therapeutic for many medical conditions. However, in the above cases it is best to have advice from your physician. Massage therapists, unless they are also qualified doctors, may not, under law, attempt to diagnose a condition. But don't forget that massage is non-invasive, relaxing and natural. It is therefore generally considered a safe treatment for most people. Sometimes it's better to be sure to be able to fully enjoy your massage.