Final answer:
If there is inflammation under a cast, it will be evident in a Warm spot, as one of the cardinal signs of inflammation is local heat.
Step-by-step explanation:
If there is inflammation under a cast, it will be evident in a Warm spot. Inflammation is typically associated with heat due to increased blood flow to the affected area. The four cardinal signs of inflammation are redness, swelling, pain, and local heat. These signs have been known since antiquity, and they indicate the body's immune response to injury or infection. While under a cast, visually noting redness or swelling can be challenging; however, identifying increased warmth in a specific area can be a clear indicator that inflammation is present.