Which term denotes redness of the skin due to irritation or inflammation?

• A. Erythema
• B. Gait
• C. Allergy
• D. Antigen

Answer: (A)

When skin looks red because of irritation or inflammation, the term used is erythema. This redness comes from the dilation of surface blood vessels, which increases blood flow to the skin to help the affected area heal. The extra blood gives the skin its red color and is a common sign of inflammation, irritation, or sun exposure. The other terms refer to different ideas: gait is about how someone walks, allergy is an immune reaction that can accompany irritation but isn’t the color change itself, and antigen is something that can trigger an immune response rather than describing the redness.