This is a response to the above enquiry.
Dry tongue and bitter taste, according to Chinese medicine, indicate liver, kidney, spleen problems. There is a Chinese term called “gan huo” or “liver fire”.
Cleanse and detox the liver with He shou wu (ho shao wu, Polygonum multiflorum), the kidneys with Du zhong (Eucommia) and the spleen. The Chinese consider the liver, the kidneys and the spleen as one “system”. Stay away from salt, and any foods that cause “fire” (shang huo) like meat, chilli pepper, etc.
Drink a lot of hot tea to clean out the system. Do not drink cold water, ice water, sodas, and anything that contains sugar. Sugar and carbohydrates cause “fire”, according to Chinese medicine.