The following are the most common causes of cloudy urine:
1. Urinary tract infection
Urinary tract infections (UTI) are one of the most common causes of cloudy urine, leading to more than 8.1 million visits to the doctor every year. The cloudy look of the urine typically comes from a discharge of either pus or blood into the urinary tract. It could also be a buildup of white blood cells that indicates the body is trying to eliminate invading bacteria.
According to the U.S. Department of Health and Human Services, females are more likely than males to get UTIs.
Other symptoms of a UTI may include:
- frequent urination
- pain during urination
- foul-smelling urine
- inability to fully empty the bladder
- abdominal, pelvis, or back pain
- bloody, or dark-tinged urine
UTIs can lead to a kidney infection, a more severe form of UTI if left untreated. An untreated kidney infection can lead to permanent kidney damage.
Symptoms of a kidney infection may or may not include those of a UTI and may also include:
- fever
- chills
- back or side pain
- nausea and vomiting
- abdominal cramps
People should see their doctor as soon as possible if they are experiencing these symptoms for proper diagnosis and treatment. Early treatment of a UTI can help relieve discomfort and prevent complications.
2. Dehydration
When more water leaves the body than the amount that enters it, dehydration can result. This can cause cloudy urine.
Children and older adults have a higher risk of dehydration.
Dehydration can be caused by:
- poor fluid intake
- diarrhea
- vomiting
- sweating
- fever
- burns
- diabetes
The symptoms of dehydration usually start mild and may include:
- dark urine
- fatigue
- dizziness
- dry mouth
- difficulty concentrating
- increased thirst
- decreased urine production
People can usually correct early dehydration simply with more water consumption.
Severe dehydration can lead to more serious conditions such as disorientation, loss of consciousness, or death.
People should seek emergency medical care for severe dehydration.
3. Sexually transmitted infection (STI)
An STI is a disease passed from one person to another through sexual contact. According to the U.S. Department of Health and Human Services, around 20 million people in the U.S. get an STI every year.
Some common STIs such as gonorrhea and chlamydia may cause cloudy urine.
These diseases prompt the immune system to produce white blood cells that, when mixed with urine, give it its cloudy appearance.
Possible symptoms of STIs other than cloudy urine include:
- genital itching
- genital pain
- pain during sexual intercourse
- pain during ejaculation
- pain during urination
- sores on genitals
- foul-smelling discharge from genitals
The best way to prevent the spread of STIs is to use protection during sexual activity. Regular testing for STIs can help people receive an early diagnosis and treatment.
People should talk with their doctor if they have any questions or concerns.
4. Vaginitis
Vaginitis is inflammation of the vagina and possibly the surrounding vulva. It can lead to cloudy urine. The most common cause of vaginitis is a bacterial infection, but viruses or fungi can also cause it.
In some cases, the body may react to the ingredients in soaps, detergents, fabric softeners, or other products. These reactions can cause inflammation in the vagina and vulva without an infection.
Additional symptoms of vaginitis include:
- itching of the vagina or vulva
- foul-smelling, discolored vaginal discharge that resembles cottage cheese
- pain during urination
- pain during sexual intercourse
People should see their doctor if they have concerns. They will determine whether the infection is bacterial, fungal, or viral and treat it accordingly.
5. Prostatitis
Prostatitis is an inflamed prostate that may cause cloudy urine. Infection or swelling of the prostate can cause this.
Other symptoms of prostatitis include:
- pain during ejaculation
- pain during urination
- frequent urination
- bloody, or dark-tinged urine
- abdominal pain
- genital pain
- pelvic pain
5. Kidney stones
Kidney stones can also cause cloudy urine. They develop from the buildup of certain minerals in the body.
Small stones may pass without incident, but larger stones can block the urinary tract and cause a UTI. The most common symptom of passing kidney stones is severe pain below the ribs, generally near one side or the lower back. The pain may radiate to the lower abdomen or groin.
Other symptoms include:
- pain during urination
- fever
- chills
- bloody, or dark-tinged urine
- foul-smelling urine
Some kidney stones do not require treatment and will pass on to the urinary tract independently.
People should see their doctor for proper diagnosis and management.
6. Diabetes or kidney damage from diabetes
Sometimes diabetes or diabetic kidney disease is the underlying cause of cloudy urine. The body may be trying to remove excess sugar that it cannot process by sending it through the urine.
Other signs of diabetes may include:
- excessive thirst
- excessive fatigue
- unexplained weight loss
- frequent urination
- frequent infections
- inadequate wound healing
If left untreated, diabetes may ultimately lead to kidney failure. If people have diabetes or are experiencing any of these symptoms, they should talk with their doctor.
7. Diet
In some cases, a person’s diet can cause their urine to be cloudy.
For example, if a person consumes large amounts of phosphorous. In that case, a cloudy appearance will occur when their kidneys attempt to filter the excess mineral from the bloodstream.
The following foods contain phosphorous:
- dairy
- meats
- seafood
- nuts and seeds
- beans
