Seek medical assistance if the pain persists. Hopefully, you will find that you overreacted, but that's preferable to winding up as a fatality. Numbness or tingling in any part of the body. This is especially important for nitrox divers. One of the earliest symptoms of oxygen toxicity is a numbness and tingling in the lips.
Symptoms can escalate rapidly to convulsions, so ascend immediately.
Susceptibility to oxygen toxicity varies from diver to diver, even from dive to dive.