See What Your Tongue Revels About Your Health..
Blisters or Sores on your tongue
Blisters can indicate that there might be some infection in your stomach or digestion issue. Sores may occur due to bite or burn. If it stays for more than two weeks it is suggested to visit dentist as they can also indicate cancer.
Thick White Layer
Thick white layer found on tongue signify poor oral hygiene and high consumption of alcohol. It can be rid of with good brushing, tongue cleaner and high intake of water.