I love my massage therapist. Of all the 90,000 people in the United States who claim massage therapy as their part-time or full-time job, mine is the greatest. Like most, she is self-employed. A large percentage of these workers are of part-time and self-employed workers. Not all states in the United States require some sort of a license to practice massage therapy. See if your local massage therapist can perform a hot stone massage. If a state does not have any massage laws, then nothing is required and a practitioner need not apply for any sort of license with the state. Each state has its own regulations, but in generally, to train in the US where a license is required it involves 500-1000 hours in length, resulting in a certificate, diploma, or degree depending on the particular school.