A masseur or a masseuse was a person who gave a massage to a person.
There were over two hundred registered Nuvian masseuses on Risa in the 2150s. (ENT: "Fallen Hero")
On 24th century Risa, some Risians worked as sonic masseurs. (DS9: "Let He Who Is Without Sin...")
Ibudan's clone received a massage from an alien masseuse of the Lauriento massage holoprogram 101A when he was murdered in 2369. (DS9: "A Man Alone")
In 2372, Jadzia Dax took Kira Nerys to a holographic recreation of the Hoobishan Baths where they were greeted by Malko and another holographic Trill masseur. (DS9: "The Way of the Warrior")
A Talaxian masseuse was part of the Paxau Resort holographic program where she gave Neelix a foot massage in 2373. (VOY: "Warlord")
When The Doctor gave Captain Kathryn Janeway an osteopathic pressure therapy in 2374, he mentioned that she could herself call lucky to have a masseur who can work all day without tiring. (VOY: "Scientific Method")
In 2376, The Doctor took the form of a holographic Tarlac masseuse when he tried to diagnose Doctor Lewis Zimmerman. (VOY: "Life Line")