If you hit someone will leave knuckle prints?

Yes, hitting someone can potentially leave knuckle prints on their skin. If the skin is not broken during the impact, the force of the blow can cause the skin to bruise and discolor under the knuckles, creating visible marks. These knuckle prints may appear as dark or reddish marks and can be painful or tender to the touch. In some cases, knuckle prints can also cause swelling or abrasions, depending on the severity of the injury.