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The theory behind this is that the hot water will raise your body temperature, thus releasing the gases that are trapped in the soft tissues of the body.(like bubbles in a soda bottle) This is dangerous in large volumes because those gases can form small bubbles in the blood stream. (The Bends / or Decompression illness) The likelihood of a hot shower raising your body temp enough to achieve this is very slim. Divers are really only at risk of this if they ascend from a dive at a high rate of speed. (Don't ascend faster than 1 foot per second!)

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Taya Kuphal

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1y ago
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14y ago

Suddenly increasing body temperature (through taking a hot shower or a hot bath) can expand gas bubbles in the blood stream which form when ascending from a dive, and can increase the risk of decompression sickness. However, unless the diver was really pushing the no decompression limits, or engaging in decompression diving, the risk is probably not that great.

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14y ago

When diving, Scuba divers breathe gas under pressure. The greater pressure causes the nitrogen in the breathing gas to dissolve in their bodily tissues (the body metabolises the oxygen).

When the diver ascends from depth, the pressure is reduced, and so the gas comes out of the tissues and into the bloodstream, where the diver expels it through his lungs. Normally these bubbles are very small (sometimes called "micro" bubbles or "silent" bubbles) and present no risk to the diver. However, even after the diver surfaces, these bubbles continue to form, and work their way out through the lungs.

If a diver flies in an aircraft, that results in a big reduction in the pressure surrounding the diver. This in turn causes those bubbles to expand, and increases the risk of decompression sickness.

In most cases the risk is modest. In a commercial airliner, they are pressurised to an equivalent of 8,000 to 10,000 feet, and so the the difference in pressure is modest. Further, because you usually have to check in at least 2 hours before take off, the diver will normally have off-gassed most of the bubbles. However, it is still wise to leave a healthy delay before flying because in the unlikely event that the aircraft suddenly depressurises, then that can create very serious problems during an already potentially dangerous situation.

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6y ago

After a dive, nitrogen bubbles that have accumulated from a dive are small and will pass from the body in 12 hours. However...........taking a shower can make the bubbles get larger. Heat expands things. So the bubbles that become heated can get bigger and cause the bends. Never take a warm/hot shower after a dive. Especially after a deep dive.

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14y ago

Normally divers are either in salt water or fresh water systems; the shower is to wash off the salts or any contaminated water from their bodies and equipment.

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Q: Why is it dangerous for a diver to take a hot shower after deep dive?
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