There is a lot of controversy as to whether black pepper once finely ground works as a natural blood coagulant when placed in the open wound. I have not been able to absolutely confirm that it works, however, there are numerous compelling stories of people using black pepper in wounds to stop bleeding. Some of the stories even credit black pepper for saving their lives due to medical facilities not being available to them at the time.
Supposedly black pepper was used during World War II to prevent soldiers wounds from bleeding until the wounds could be sutured up. Today it is an uncommon practice, but is still known by some after being passed down as folk remedies. I wouldn't say it is common, but it is still practiced in some restaurants where the preparing of meals sometimes results in small wounds to the hands and fingers.
The first step would be to finely grind the pepper. Some claim this is necessary, others say regular black pepper is fine enough. Then, simply pour the black pepper onto the wound and apply pressure. You might be surprised that the pepper does not burn when placed in the wound. Luckily, no taste buds in there!!! Haha Hmmmm... I wonder what to do if you get a cut in your mouth???
But I digress. Using black pepper should not stop you from seeking medical help if you have a bad wound. Stitches and antibacterial ointments are a couple of reasons you might need to seek professional help if you have a bad wound.