Numbness, and more commonly paraesthesias (tingling, prickling, freezing), are usually diffuse on one side or, exceptionally, may be highly localised even to one tooth.
en.wikipedia.org This is the reason why neck pain is a common symptom, which can cause hand tingling.
en.wikipedia.org In more advanced stages, the disease may cause tingling, increased sensitivity and pain.
en.wikipedia.org Symptoms of a more serious cone snail sting include intense, localized pain, swelling, numbness and tingling and vomiting.
en.wikipedia.org Overdose can lead to headache, tinnitus, numbness and tingling around the mouth and tongue, convulsions, inability to breathe, and decreased heart function.
en.wikipedia.org