Numbness after food or drinks is not a common sign of allergy. You can have an allergy to cocoa bean, but usual reactions would include itching, swelling and rhinitis. Caffeine a chemical found in coffee can cause palpitations and agitation and exacerbate panic attacks with facial and limb numbness. If you exhibit ongoing facial and upper body numbness, you should see a Neurologist to exclude a nerve disorder such as Multiple Sclerosis or a trapped nerve in the neck.
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