 [ Symptoms ] thumb is discolored and swelled very painful to touch or put in warm water it turns black when i put it in warm water started about three weeks ago with swelling and discoloring it looks like a bruise on the bottom side up toward the outside tip and is swelled from the bottom crease at the joint up to the tip i have sever pain when i press it against something or try to use it sever pain when in warm water and turns black it does not hurt to bend it and i did not sprain or smash it it is always cold from the knuckle to the tip and feels numb most of the time until i try to use it or push on it thank you [ Disease ] it is impossible to inherit hypoglycemia hypoglycemia is an emergent situation not a disease mostly people who have diabetes any type especially those taking insulin are susceptible to having low blood glucosesugar hypoglycemia but other situations may spawn a hypoglycemic reaction fasting for an extended period especially with exercise some herbal supplements avoid cinnamon especially if you are on insulin hypothyroidism etc if diabetes runs in your family and you find you are experiencing hypoglycemic symptoms dizziness confusion shaking sweating when you should not be you really need to tell your dr and they can test your blood sugar and let you know if there is something to be addressed good luck and be well