was sind helle stellen im kot — when to see a doctor?

Light spots in stool (e.g., white, yellowish, or frothy) can have various causes. Often they are harmless food residues (e.g., undigested fat, seeds, mucus). However, if they occur repeatedly or are accompanied by other symptoms, a doctor should be consulted. Possible serious causes include bile duct issues (e.g., gallstones, liver disease), pancreatic insufficiency (steatorrhea), celiac disease, or infections. A doctor visit is advisable if light spots persist for more than a week, or are accompanied by diarrhea, abdominal pain, weight loss, fever, or blood in stool. Also, if you have known risk factors (e.g., gallbladder removal, chronic bowel disease), early evaluation is recommended. The evidence is based on clinical practice and guidelines; no direct studies from the provided context. Note: This text does not replace medical advice. If uncertain or symptoms appear, always consult a physician.