Is It Safe to Use a Hot Tub After Diving? Effects on Off-Gassing and DCSQ: What possible impact does soaking in a hot tub after diving have on off-gassing and DCS? A: More and more resorts and liveaboards are offering hot tubs for clients, but getting into a hot tub after diving does alter decompression stress. The short version is that using a hot tub immediately after diving can increase the risk of decompression sickness (DCS). How long should divers wait before using a hot tub or hot shower?