A 25-year-old female presents with dysuria, frequency, and urgency for the past three days. She denies fever, flank pain, or vaginal discharge. On examination, suprapubic tenderness is present. Urinalysis reveals positive leukocyte esterase and nitrites. What is the most likely diagnosis, and what is the management plan?
The most likely diagnosis is uncomplicated cystitis (also known as a lower urinary tract infection). The patient should be treated with antibiotics. First-line options include nitrofurantoin, fosfomycin, or trimethoprim-sulfamethoxazole (if local resistance rates are low). She should also be advised to drink plenty of fluids and use over-the-counter phenazopyridine for symptom relief if needed.