Close-range information
When a whisker bends, receptors in its follicle send information to the nervous system. This helps a cat detect nearby surfaces and changes in air movement, especially where vision is less useful at very close range.
Whiskers are not only on the muzzle
Cats also have specialised tactile hairs above the eyes, on the cheeks and on the backs of the forelegs. Whisker position can contribute to the overall expression of attention or tension, but it should be read with ears, eyes, posture and context.
Never trim them for appearance
Cutting a whisker does not hurt in the same way as cutting skin, but it removes useful sensory input until the hair regrows. Let whiskers shed naturally. If facial sensitivity, asymmetry or broken whiskers appear with skin changes, ask a veterinarian.
Sources and further reading
Sources support the general information on this page. CatMind is an observation tool, not a veterinary diagnostic service.
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