Many massage therapists have not undergone formal massage education but have learned massage through sheer observation and interest. Yes, it is easy to learn massage this way but there are some cases in which massage should not be applied. This is why massage education is important. Massage is contraindicated in cases such as osteoporosis, and those with deep vein thrombosis, bleeding disorders, and weakened bones due to cancer and other diseases. Only a professional massage therapist who has undergone professional massage schooling may be aware of these.