It is best to reach the level of clear water before doing colonoscopy, but since intestinal discharge is interfered by bile and other digestive juices, yellow water is fine as long as you make sure there is no fecal matter.
Before doing colonoscopy, you need to drain all the contents of the intestinal tract, such as food residues and feces, and only when the intestinal mucosa has no fecal and other residues attached to it can you clearly observe whether there are any organic lesions on the intestinal mucosa, so that it is not easy to miss the diagnosis and misdiagnosis. Therefore, it is best to achieve the degree of pulling clear water before doing colonoscopy.
Of course, the discharge is also subject to intestinal bile and other digestive fluids interference, can also make the discharge become yellow, as long as it does not contain fecal slag, pull yellow water is also OK. At the same time, it is also important to be careful not to excessive diarrhea before colonoscopy in order to pull clear water, which may lead to electrolyte disorders in the body.
Therefore, it is recommended to find a professional doctor to take a look at the excretion before colonoscopy, so as not to affect the effect of colonoscopy.