I have pain in my left teste from last four or five days so what should i do please sir and i am also medical student?

Get evaluated. : There are many causes of testicular pain and you should see a physician for a history, physical examination, and then possibly a scrotal ultrasound. The most worrisome is torsion, when the blood supply to the testicle is twisted closed. Infections can result in epididymitis or orchitis. Others causes are more benign, such as hydroceles & spermatoceles. A full workup will help determine the cause.