Mucus in Urine - Should You be Concerned?

Amanda Kauffman
Amanda Kauffman
March 27, 2023
min read
Technically reviewed by: 
Charisse Cartin
Mucus in Urine - Should You be Concerned?

Mucus in urine can appear as white threads at the bottom of the toilet bowl after you pee. Too much mucus could be a sign of a UTI or another medical condition, which you can evaluate using urine test strips.

What Are Mucus Threads in Urine?

Mucus is the slippery goo-like substance secreted from the body. Most people associate mucus with coughs or colds, but it's normal for a small amount of mucus to appear in the urine. That's because the bladder and urethra contain mucus membranes to help keep the urinary tract moist. When these membranes produce mucus, it mixes with urine before you go to pee.

However, larger amounts of mucus in the urine or bloody mucus can be a sign of a urinary tract infection (UTI) or another underlying medical condition. This can result in stringy mucus threads collecting at the bottom of the toilet bowl or pee that looks unusually cloudy.

What Does Mucus in Urine Mean for Your Health?

Too much mucus in urine can be a sign of several medical conditions. Possibilities include:

  • Urinary tract infection (UTI): More likely if excess mucus present in urine appears alongside pain when peeing, blood in your pee, a more frequent need to pee, or lower abdominal pain.
  • Chlamydia or Gonorrhea: Sexually transmitted infections (STIs) that may cause watery discharge, which often looks like mucus in urine.
  • Kidney stones: Mineral deposits that may pass out of your kidneys and into your urinary tract, prompting your body to produce mucus to expel them.
  • Bladder cancer (uncommon): A rare type of cancer called mucinous adenocarcinoma causes excessive mucus to develop in the bladder.

A urine test — also called a urinalysis — can help determine the level of mucus in the urine so you can follow up with a healthcare provider if there's cause for concern.

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How to Test Mucus in Urine

A urinalysis involves collecting a sample of pee in a specimen cup, which is then analyzed for the presence of certain cells, bacteria, and other chemicals. Sometimes, a sample is requested first thing in the morning because more concentrated urine is easier to analyze. Urine collection containers and instructions for male and female patients could differ to test mucus in urine.

There are three basic types of urine tests:

  • Visual exam. The lab will test the color and clearness of the urine, as well as the presence of any blood or foam.
  • Dipstick test. The lab will dip a thin, plastic stick with chemicals into the urine. The stick will change color if a certain chemical is present at above-average levels.
  • Microscopic exam. Laboratory professionals will examine a small amount of urine under a microscope to check for things that can't be seen with the naked eye, like red blood cells, pus cells, bacteria, and mucus levels.

Other mucus in urine tests may be necessary to rule out specific conditions. For example, a urine protein test can help you determine whether you have kidney stones.

Urine test strips and other home tests can offer peace of mind if there is mucus present in your urine. If you have further questions, contact a healthcare provider.


Unusual white, thread-like structures in the urine could be due to mucus in the urine. Clinical diagnosis of mucus in urine requires a urinalysis test. Excess mucus in urine can signify several medical conditions, and which one you have depends on your other symptoms and the overall results of your urinalysis. As a general rule, if excess mucus present in urine appears alongside pain when peeing, a more frequent need to pee, lower abdominal pain, or blood in your pee, you could have a UTI. Other medical conditions that could lead to mucus in urine include sexually transmitted diseases and kidney stones.

  1. Bono, M.J., Leslie, S.W., Raygaert, W.C., "Urinary Tract Infection," Treasure Island (FL): StatPearls Publishing, 2022.
  2. Brennan, D., “How Do You Treat Mucus in Urine,” MedicineNet, 2021.
  3. Milani, D.A.Q., Jialal, I., "Urinalysis," Treasure Island (FL): StatPearls Publishing, 2022.
  4. Pan, X., Jin, L., He, T., Hu, J., Quan, J., Zhou, L., Ni, L., Yang, S., Mao, X., & Lai, Y. (2016). “Mucinous adenocarcinoma of the bladder: A case report and review of the literature.” Molecular and clinical oncology, 5(4), 447 448.
  5. Stöppler, M.C., “Kidney Stones (Nephrolithiasis),” MedicineNet, 2022.
  6. The University of Rochester Medical Center, “Chlamydia Trachomatis (Urine).”
  7. The University of Rochester Medical Center, “Gonorrhea (Urine).”

About the Author
Amanda Kauffman

Amanda Kauffman is a healthcare writer with a passion for providing accurate and useful information to readers. With a background in biology and nutrition, Amanda writes about the human body, diet, and diseases that impact humans.

She is deeply committed to empowering individuals to make informed decisions about their health, as she believes that our choices have a great impact on our health outcomes. This drives her to research and write about a wide range of topics, including preventive measures, treatments, and the latest scientific developments in healthcare.

Amanda is thrilled to be working with Diagnox, a company that shares her vision for improved healthcare delivery for all. Through her writing, she hopes to inspire and educate readers to take control of their health and make informed choices that will lead to a happier and healthier life.

About the Reviewer
This blog was
Technically reviewed by: 
Charisse Cartin

Charisse Cartin is a talented and dedicated editor who has contributed significantly to this blog.

The blog was also reviewed by the Diagnox content team. Diagnox Staff consists of a multidisciplinary team of scientists, content writers, and healthcare professionals with an expertise to create and review high-quality, informative, accurate, and easy-to-understand content for both professionals and everyday readers. Our staff follows strict guidelines to ensure the credibility and authenticity of the information, reviewing them independently and verifying them by various scientific and technical sources to ensure accuracy. Our review team believes in delivering knowledge free from bias to improve public health and well-being.

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