The swelling caused by a contact wound is due to escape of hot gases from the weapon that was discharged.

Question

Quizplus · Accepted Answer

When a weapon is discharged, the hot gases produced can cause the tissue surrounding the entry wound to swell. This is because the gases have a high pressure and temperature, and as they escape they push apart the surrounding tissue, causing it to swell. This phenomenon is known as temporary cavitation.

The Swelling Caused by a Contact Wound Is Due to Escape