Pain on both sides of the abdomen and urination are first considered to be caused by acute cystitis, and male patients may also be caused by other diseases such as prostatitis, and female patients are also considered to be caused by pelvic inflammation and other diseases. 1. Acute cystitis: It is an acute inflammatory disease that occurs in the bladder. The main manifestations are frequent urination, urinary urgency, urinary pain, which may be accompanied by hematuria, perineal discomfort, fever and other symptoms, thus manifesting pain on both sides of the abdomen and urination. 2. Prostatitis: refers to the inflammation that occurs in the prostate gland. It mainly manifests as pain and discomfort in the perineum, frequent urination, urgency, painful urination, poor urination, thinning of the urine stream, bifurcation, interruption and other symptoms, which can also manifest as pain on both sides of the abdomen and excessive urination. 3. Pelvic inflammatory disease: female pelvic inflammatory disease due to different parts of the body, different pathogens, symptoms vary, common symptoms of lower abdominal pain, falling sensation, leukorrhea, vaginal bleeding, etc., and some patients may have urethral symptoms, manifested as frequent urination, urinary urgency, urinary pain and other symptoms, which may be manifested as pain in both sides of the abdomen, urinary polyuria. There are many other causes of pain on both sides of the abdomen and excessive urination, which should be taken seriously, timely consultation, identification of the cause of the disease, and follow the medical advice for further treatment or therapy.