Differential Diagnosis for Burning Sensation in Male Patient when Urinating
Single Most Likely Diagnosis
- Urethritis due to Gonorrhea or Chlamydia: This is the most likely diagnosis given the symptom of burning sensation during urination (dysuria) one day after receiving oral sex, which is a high-risk activity for sexually transmitted infections (STIs). Both gonorrhea and chlamydia are common STIs that can cause urethritis, leading to dysuria.
Other Likely Diagnoses
- Urethritis due to Herpes Simplex Virus (HSV): HSV can cause urethritis, especially if the patient's partner has oral herpes. The symptoms can include dysuria, along with other symptoms like genital ulcers.
- Urethritis due to Mycoplasma genitalium: This is another cause of nongonococcal urethritis, which can present with dysuria.
- Urethral Irritation or Trauma: The act of oral sex could potentially cause minor trauma or irritation to the urethra, leading to a burning sensation during urination.
Do Not Miss Diagnoses
- Urethral Stricture: Although less likely, a urethral stricture could cause obstructive urinary symptoms, including dysuria. It's crucial not to miss this diagnosis as it requires specific treatment.
- Kidney Stones: While the timing and context might not strongly suggest kidney stones, they can cause severe pain and dysuria. Missing this diagnosis could lead to severe complications.
Rare Diagnoses
- Reiter's Syndrome (Reactive Arthritis): This is a rare condition that can occur after certain bacterial infections, including STIs. It involves arthritis, urethritis, and conjunctivitis.
- Urethral Cancer: Extremely rare, but any persistent or severe urinary symptoms should prompt a thorough investigation to rule out malignancies.