Final answer:
An inflammatory skin rash caused by radiation can be described as radiodermatitis, which involves symptoms like inflammation, redness, and itching.
Step-by-step explanation:
The term that could best describe an inflammatory skin rash caused by radiation is radiodermatitis. This condition is characterized by inflammation of the skin that occurs as a result of exposure to radiation. Similar to other skin conditions such as eczema and psoriasis, radiodermatitis can present as redness, itching, and in severe cases, blistering and peeling of the skin. It is important to differentiate radiodermatitis from rashes caused by other conditions, as management and treatment can differ significantly.