Many divers take advantage of the free time before or after the dive to have relaxation : why not have a massage session ?
Some instructors will tell you that it is strictly forbidden, others will tell you that they have never heard of it. Not easy... So who to believe ? Maybe could look at what the medical community thinks about it. source : https://www.diversalertnetwork.org/medical/faq/Massage__Diving Many people talk the possible association between massage and DCS risk.