Why do they have a rough tong?

Answer 1

Rough tongues are often a result of a condition called "lingua plicata" or fissured tongue, where the surface of the tongue develops deep grooves or fissures. This can occur due to various factors, including genetic predisposition, dehydration, or certain nutritional deficiencies. Additionally, irritation from certain foods or habits, like smoking, can contribute to a rough texture. It's generally harmless, but maintaining good oral hygiene is important to prevent any potential issues.