Hi. Thanks for your query. While you pushed the wheelbarrow with a flat Tyre, the muscles of the abdomen went into spasm which in turn pulled the cremaster muscle along with pull on the testicle. During this movement the testis can get a torsion compromising the blood supply . This gives you repeated pain. I would advise you the following: Get an examination by an Urologist / General Surgeon Ultrasonography and color doppler Scrotal support Bed rest Single stitch fixation of the testis if there is evidence of torsion.