Aug 22, · Mucus in urine can be a sign of bladder cancer, but this isn’t common. If mucus in urine is a sign of cancer, it may be accompanied by other symptoms like blood in the urine, abdominal pain, or. Mar 11, · Mucus might be a result of inflammation, and in that case, there's going to be a need to treat it before it causes further problems. When the mucus is caused by, for instance, IBS or IBD, getting those conditions under control is going to help in stopping the mucus production in the large hfkdocs.com: Amber J. Tresca. Find patient medical information for Mucus Relief PE Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.