A whitehead is a closed comedone, where the clogged pore stays covered by a thin layer of skin, appearing as a small white or flesh-toned bump. Because it isn't exposed to air the way a blackhead is, it keeps its pale colour. It's another early-stage lesion, common before more inflamed acne develops.

A wheal is the raised, red or pale, itchy bump that appears on the skin during a hive outbreak. Fluid leaks from tiny blood vessels just under the surface, causing the swelling. Most wheals fade within a day, and spotting them is often the first step in diagnosing urticaria.

Wheezing means the high-pitched whistling sound caused by narrowed or "clamped" airways. This term describes an important change in the lungs or airways. Understanding it can help explain symptoms such as breathlessness, mucus build-up, or repeated infections. It also supports doctors in monitoring the condition and adjusting treatment.