<s>[INST] Age: 19Height: 5ft7Weight: 10 stoneNo previous medical conditions worth mentioning.I have had an enlarged tongue for about a year now and I dont know why. It may have something to do with drug use but I cant find anything online that links the two. [/INST] Hello, Your medical and dental history would be helpful in determining if a Chat Doctor.  There are many reasons, and it can signal a systemic change occurring to your body - hormonal, endocrine disorder, organ dysfunction or damage, allergy, diet change, infection, tumor or cancer. I would suggest a blood test and physical evaluation as well as an updated dental exam. Clinical evaluation of the tongue would be helpful. Other conditions such as texture, color, coating on tongue may give some direction and help with a diagnosis. Trauma or habits can contribute. Does anything seem to affect the tongue? Any pain or sore spots? Thank you for your inquiry. I would be glad to expand my answer with additional details. I am glad to offer as much assistance as possible without seeing your condition. </s>