The small stomach and testicular swelling pain, this to consider three diseases: one, is acute orchitis; two, may be varicocele; three, will have to consider whether there is prostatitis. In this case, the first thing to determine is whether the testicles are swollen, whether this pain is constant or aggravated after standing, and also to pay attention to whether there is frequent urination, urinary urgency, and painful urination. It is recommended to do scrotal ultrasound examination, prostate fluid massage and routine urine examination, which can make the initial judgment. If it is orchitis, the testicles will be enlarged and the pain may radiate to the perineum, while the spermatic cord may be thickened. orchitis will need to be treated with intravenous antibacterial agents, and if it is varicocele, it will be aggravated especially after standing for a long time after exercise. If it is prostatitis, the prostate fluid will be tested and there will be a large number of white blood cells.