My left testicle has hurt off and on for the last three days mainly when walking, i also have a very low pain in my lower left abdomen what may it be?

See answer: Epidididymitis or prostatitis would be common causes of testicular and lower abdominal pain. Epididymitis usually associated with noticeable swelling and tenderness (and not so with non-bacterial prostatitis) and treated with antibiotics and anti-inflammatory meds. Non-bacterial prostatitis (most common form) treated with a variety of measures. Recommend you see md or urologist if persists.

Sounds like: You may have an inguinal hernia, but that would just be a guess based on little information. I would have your doctor take a look at you.