Firefighters were called to the salon, Krischorn Health Massage Shop, on Soi Pha-niang, Ratsada, at 10am on Friday (Nov 17).
The firefighters managed to douse the blaze, but not before the shop had suffered heavy damage.
Officers at the Phuket City Municipality branch of the Department of Disaster Prevention and Mitigation (DDPM) did not speculate as to the cause of the fire.
However, photos of the scene showed heavy fire damage to a wall beside a small blessings altar inside the shop. Such altars traditionally have lit candles and incense placed on them.