<s>[INST] Hi I am 51 female ,perimenopausal,for the last 18 months I have suffered with a yellow coated tongue in the morning and it is getting a lot worse.I feel awful in the mornings any way and look generaly unwell.I have a healthy diet.I am seeing a gynocologist for cyst on my ovaries and my uterus had a thicker lining than normal.I have a lot of wind and bloating and pains in my abdomen-I am a bit of a mess. Can you help [/INST] Hello:)Welcome to Chat Doctor. A yellow tongue indicates accumulation of bacteria. Your hormonal irregularity can add to this. These bacteria then release certain chemical to make the tongue yellow in color. Have adequate water 3 liters per day. Reduce consumption of caffeinated beverages. Maintain oral hygiene and floss daily. Use a mild mouth wash thrice a week. Cleanse your tongue regularly using a tongue blade. Quit any tobacco and alcoholic habits. Regards. </s>