What symptom is commonly observed with blister agents?

Blister agents, also known as chemical warfare agents like mustard gas, typically cause symptoms associated with irritation and damage to the skin and mucous membranes. Inflammation is a hallmark reaction that occurs when blister agents come into contact with the body. This inflammation can lead to painful blisters, redness, and swelling at the exposure site, thus making it the most commonly observed symptom.

While muscle twitching, convulsions, and even death can occur with other types of chemical agents or in severe cases of exposure, they are not direct or immediate symptoms associated specifically with blister agents. Instead, the primary concern following exposure to blister agents is the inflammatory response, which can have serious consequences if not addressed.