Recurring Deep Cracks In Tongue, Sensitive To Spicy, Salty Foods. Unable To Diagnose. Disapperaed When Had Pneumonia

I have had a recurring problem with deep cracks in my tongue, and super-sensitivity to spicy and salty foods. I have seen a dentist, a dental surgeon, the head of Baylor College School of Dentistry, my primary physician, and a gastroenterologist. etc. on and on. No one has the faintest idea what it is. It disappeared for six months when I was hospitalized with pneumonia and had antibiotics for about three months. It also affects the toothpaste I can use without burning. I am 75 years old, have been in good health all my life. Thank you.