Burning or pain when urinating, lower abdominal pressure pain, or needing to use the bathroom frequently may be warning signs of a urinary tract infection, a common condition that affects daily life. If left untreated without appropriate care, it can spread and cause severe complications to kidney function. Understanding the causes, symptoms, and proper self-care methods is therefore important to help manage this condition promptly.
Get to know Urinary Tract Infection (Urinary Tract Infection – UTI)
A urinary tract infection, or UTI (Urinary Tract Infection), is a condition in which organs in the urinary tract become inflamed due to a bacterial infection. The urinary tract consists of the kidneys, renal pelvis, ureters, bladder, and urethra. Infection can occur in any part, but it is most commonly found in the bladder and urethra, which are the lower organs.
Causes of Urinary Tract Infection
The main cause of urinary tract infection is usually bacteria entering the urinary tract through the urethral opening and multiplying until inflammation occurs, as detailed below.
- E. coli bacteria: The most common cause. This bacterium lives in the intestines and is often present in fecal contamination. If cleaning is done incorrectly, the bacteria can spread to the urethra.
- Other types of bacteria: Such as Klebsiella or Enterococcus, which can also cause infection.
- Infection from urinary catheterization: Often found in patients who require a urinary catheter for a long period, allowing bacteria to accumulate and causing inflammation more easily.
Risk factors for Urinary Tract Infection in women
Women are many times more likely to develop a urinary tract infection than men due to physiological risk factors and bodily changes that promote it, as follows.
Female urethral structure
Women have a shorter urethra than men, and the urethral opening is also close to the vagina and anus. This allows bacteria around the external area to move upward into the bladder more easily and quickly.
Hormonal changes during menopause
When women enter menopause, the body produces less estrogen. This causes the lining of the urinary tract and vagina to become thinner and drier. It also leads to a loss of beneficial bacteria that help maintain balance. Natural defense mechanisms therefore decline, increasing the risk of infection.
Use of certain contraceptive devices
Some methods of contraception, such as a diaphragm or spermicides, may irritate the vaginal lining and alter the natural bacterial balance. This creates an opportunity for disease-causing bacteria to grow well, leading to inflammation.
Risk factors for Urinary Tract Infection in men
Although men are less likely to develop this condition than women, when urinary tract infection occurs, it is often due to structural abnormalities or other underlying pathology.
Enlarged prostate (BPH)
This is an important risk factor commonly found in older men. When the prostate enlarges, it compresses the urethra, causing urine flow difficulty, straining for a long time, and residual urine remaining in the bladder. This retained urine becomes an excellent breeding ground for bacterial growth.
Abnormal urinary tract structure
Internal abnormalities, such as urethral narrowing from scar tissue or pathology that causes urine to flow backward, reduce the effectiveness of the natural mechanism that flushes bacteria out of the body through urination.
Other risk factors found in both sexes
In addition to sex-specific physiological factors, there are also daily lifestyle behaviors and other health problems that increase the risk of urinary tract infection in both men and women.
Holding urine and drinking too little water
Drinking too little water causes the body to produce insufficient urine to help flush germs out. Coupled with the habit of holding urine for long periods, it further increases the time for bacteria to adhere and multiply in the bladder.
Urinary tract stones
Stones can obstruct urine flow, causing blockage and urine retention. In addition, the rough surface of stones can harbor bacteria, making infections harder to treat and more likely to recur.
Immunodeficiency or diabetes
People with low immunity, or patients with diabetes who cannot control blood sugar levels, may have sugar mixed in the urine, which serves as excellent food for bacteria. Combined with weakened immunity, the body cannot fully fight the infection.
Symptoms of Urinary Tract Infection: how to recognize them
Symptoms of urinary tract infection vary depending on which part of the urinary tract is inflamed and infected. Abnormalities can be observed as follows.
Symptoms of infection in the lower urethra and bladder
When inflammation occurs in the bladder, patients often have burning pain during urination, frequent urination, crampy discomfort as if not fully voided, leading to the sensation of incomplete emptying , pain or burning near the end of urination all the time, lower abdominal pressure pain, cloudy urine with an unusually foul odor, and in some cases with significant inflammation, blood in the urine.
Symptoms of upper renal pelvis infection
If the infection is allowed to spread upward to the kidneys, patients often develop more severe and acute symptoms, such as high fever, chills, severe back pain or flank pain, nausea, and vomiting. These are danger signs and patients should see a doctor immediately to prevent complications.
Complications if not treated promptly
If symptoms occur and are left untreated, urinary tract infection can lead to dangerous complications, as follows.
- Bacteria can spread to the renal pelvis, causing acute pyelonephritis, which may result in permanent kidney cell damage.
- In severe infection, bacteria may enter the bloodstream, leading to sepsis, which can be life-threatening.
- Chronic, recurrent infection may cause urethral narrowing (especially in men) due to scarring from inflammation.
- In pregnant women, infection may increase the risk of preterm birth or low birth weight.
Diagnosis of Urinary Tract Infection
The attending physician will evaluate symptoms to plan appropriate treatment. The main diagnostic approaches are as follows.
- Medical history and physical examination: Assess symptom characteristics, duration, risk behaviors, and palpate the abdomen or flank to locate tenderness.
- Urinalysis: Check for white blood cells, red blood cells, or bacteria in the urine to confirm inflammation.
- Urine culture: To identify the causative bacteria, enabling the physician to choose targeted antibiotics.
- Imaging studies: Such as ultrasound or computed tomography (CT scan), often used in recurrent infections to look for structural abnormalities, stones, or obstruction.
How to treat Urinary Tract Infection
The goals of treatment for urinary tract infection are to eliminate bacteria, relieve pain, and prevent recurrence, with the following approaches.
- Antibiotics: The main treatment to kill bacteria. The physician will consider the type and duration based on disease severity. Importantly, patients must take the full course exactly as prescribed even if symptoms improve, to prevent antibiotic resistance.
- Medication to relieve urinary tract pain: The physician may prescribe a urinary tract analgesic, which numbs the urinary tract lining to relieve pain and burning and directly reduce painful urination, helping patients urinate more comfortably during the early period before antibiotics take full effect.
- Treating the root cause: If infection is caused by another condition, such as stones or an enlarged prostate, the physician will consider treating it as well to prevent future recurrence.
How to prevent Urinary Tract Infection on your own
Lifestyle changes are key to sustainably reducing the risk of urinary tract infection.
- Drink enough clean water: Drink at least 8–10 glasses per day to help ensure sufficient urine for voiding and flushing bacteria out of the urinary tract.
- Avoid holding urine: When you feel the urge, go to the bathroom immediately. Do not hold it for too long to reduce the time bacteria can accumulate.
- Wipe correctly: For women, after using the toilet, always wipe from front to back to prevent transferring bacteria from the anus to the urethra.
- Urinate after sexual intercourse: To help flush out bacteria that may be pushed into the urethra during intercourse.
- Maintain intimate hygiene: Avoid cleansing products with fragrance or harsh chemicals, and wear breathable cotton underwear to reduce moisture.
Diagnose and treat urinary tract diseases at Bangkok Hospital
Abnormalities in the urinary excretory system directly affect quality of life. The Urology Center, Bangkok Hospital is ready to provide consultation and care for patients with urinary tract conditions, with specialist physicians working together with a multidisciplinary team to evaluate and plan treatment appropriate for each patient. Technology and medical equipment are also used to support diagnosis to identify the true cause, under safety standards, helping patients return to normal daily life.
Article summary
Urinary tract infection is a condition caused by infectious inflammation in the urinary excretory system. Although it is common in women, it can also occur in men. Importantly, when burning pain during urination or lower abdominal pressure pain begins, it should not be ignored. Patients should promptly see a doctor for diagnosis and proper antibiotic treatment, along with behavior adjustments such as drinking enough water and not holding urine, to improve symptoms and prevent recurrence.
Frequently Asked Questions (FAQ) about Urinary Tract Infection
1. Can a urinary tract infection go away on its own?
In most cases, it does not resolve on its own. Antibiotics are required to eliminate the bacteria. If left untreated, the infection may spread to the kidneys and lead to more serious complications.
2. Does cranberry juice really help treat urinary tract infection?
Drinking cranberry juice cannot prevent or treat urinary tract infection. However, taking cranberry extract as a dietary supplement containing proanthocyanidins (Proanthocyanidins) may help reduce bacterial adherence to the urinary tract wall, which may somewhat reduce risk, but it cannot replace antibiotics for treating an established infection.
3. Is urinary tract infection considered a sexually transmitted disease?
No, it is not classified as a sexually transmitted disease. However, sexual intercourse can be a factor that pushes external-area bacteria into the urethra and cause inflammation.
4. If a pregnant woman has a urinary tract infection, is it dangerous?
It can be dangerous, as it may increase the risk of pyelonephritis, preterm labor, and low birth weight. Pregnant women with symptoms should see a doctor immediately.
5. If urinary tract infection recurs frequently, what should be done?
Recurrent UTI (Recurrent UTI) is defined as having the condition return 2 or more times within 6 months, or 3 or more times within 1 year. If a patient meets these criteria, they should see a specialist for an in-depth evaluation to determine the underlying cause. The physician may consider additional tests as follows.
- Urine culture: Recommended every time symptoms occur to track the pathogen pattern and test antibiotic susceptibility.
- Imaging studies: Such as ultrasound or computed tomography (CT scan) to look for structural abnormalities, hidden stones, or kidney abnormalities.
- Cystoscopy: The physician may consider this in some cases to closely examine abnormalities inside the bladder.
