Study on the Use of Traditional Chinese Medicine Diagnostic Tools to Assist in Identifying the Clinical Characteristics of Inflammatory Bowel Disease and Research on Metabolic Plastids of Tongue Coating

This study is exploring whether Traditional Chinese Medicine tools — like analyzing the coating on your tongue — can help doctors better understand inflammatory bowel disease (IBD). Researchers are looking at differences between people who have Crohn's disease or ulcerative colitis and people who don't. **You may be eligible if...** - You are 18 or older - You have a confirmed diagnosis of Crohn's disease or ulcerative colitis (experimental group), OR you have no IBD and no significant gut symptoms (control group) - You are able to give informed consent and follow study procedures **You may NOT be eligible if...** - You had major surgery, chemotherapy, or radiation in the past month - You are pregnant - You are in the control group and have a diagnosed psychiatric disorder or major gastrointestinal disease (such as gut cancer) - Your doctor decides participation is not right for you Talk to your doctor to see if this trial is right for you.