you are normal apko hard erection ki wajah say pain sa feel hota hy, or koi bat ni ,scrotum kay nechy wo muscles hen  jo penis ko erect kurny mah important kerdar adaa kurty hen yani Pc muscles or jub apko hard erection hoti tub apko esa pain feel hoa hy, dont worry,agur apko bot ziyada pain hota tu ap Urologist say mushwara kurin taa kay cause ka puta chulaya ja suky or oski treatment ho suky, wesy mery khiyaal sy apko serf hard erection ki waja sy jo pain thora saa feel hota wo he  hy,