My father in law is 63 years old. Nowadays he is facing burning sensation on the tongue. What is this and is the remedy.

Burning sensation in tongue can be due to several reason. The main reason could be decrease in natural saliva or thinning of saliva. You can use a substitute

To avoid infection and reduce pain in a first-degree burn on the tongue: rinse the area well with cool water for a few minutes. Remove any dirt or particles that may be on the burn. Wet a clean cloth with cool water and hold it on top of the burn. Suck on ice chips or a popsicle to soothe the pain. Gargle with cool water or salt water. Avoid warm or hot liquids, which could irritate the burn. Take acetaminophen or ibuprofen for pain and inflammation. Sprinkle a few grains of sugar on the tongue to relieve pain.