Fasting for religious purpose. top of my mouth and gums have gone numb and there's tingling in my mouth & fingers.

See oral surgeon: Mouth may be sore sometimes due to lack of moisture but both fingers and mouth going numb requires for patient to see MD ASAP. Good luck.

Seek help now: Combination of peripheral and central numbness is disconcerting. You probably need Neurologic exam. Call PCP or go to ER now, not tomorrow morning.

In your case: is a sign of anxiety, and one that can cause a great deal of distress. Depending on the cause of your anxiety symptoms, your health care provider can recommend appropriate treatment. See your PCP for evaluation and possible referral for cognitive behaivor therapy.

See Dr.: How long is the fast and are you limited from all foods and drinks? Need to always be aware of your health when fasting. Religions often have some type of allowances for health concerns.