I slipped and fell, after some hours my left big toe seemed stiff and it's so painful, i'm not able to walk properly. pls what could be the cause?

Turf Toe.: There is not enough information to make a determination as to the exact nature of your injury. Generally, after an injury like yours, the swelling can severely restrict the toes motion and cause both stiffness and pain. This is in part, the way your body begins the reparative processes associated with healing the damaged tissues. To remove all doubt, have your foot examined and possibly x-rayed.

Swollen toe: It could be soft tissue injury or fracture as well . Swelling occurs as a consequence of injury and that itself can cause stiffness . Examination would be needed to give a more confirmed answer , please consult a doctor .