What does a tick that has bitten a human look like? - briefly
An engorged tick attached to a person appears markedly enlarged, with a balloon‑like, rounded body that is darker and more opaque than an unfed tick. The abdomen expands to fill the entire visible portion, often resembling a small, reddish‑brown or grayish lump.
What does a tick that has bitten a human look like? - in detail
A tick that has fed on a person undergoes distinct changes compared to its unfed stage. The body becomes markedly enlarged, often increasing three‑ to fourfold in length, reaching up to 10 mm or more depending on species. The abdomen expands into a rounded, balloon‑like shape, while the dorsal shield (scutum) remains relatively unchanged, creating a noticeable contrast between the hardened anterior and the soft, engorged posterior.
Color shifts from a light brown or reddish hue in the unfed state to a deep, glossy brown or black, sometimes appearing almost translucent when the cuticle is stretched. The surface may show a glossy sheen due to the presence of blood within the cuticle.
Key visual indicators include:
- Size: Length comparable to a small pea; width proportionally increased.
- Shape: Distended abdomen forming a smooth, dome‑shaped contour.
- Color: Darkened, often uniformly pigmented; occasional visible red spots where blood pools.
- Legs: Still clearly visible, protruding from the enlarged body, though sometimes partially obscured by the swollen cuticle.
- Mouthparts: Visible at the anterior end, anchored to the skin; the feeding tube may still be embedded.
Location on the host often corresponds to warm, protected areas such as the scalp, armpits, groin, or behind the knees. The attachment site may show a small puncture wound surrounded by a faint halo of redness, but the tick itself remains the most conspicuous element.
Recognition of these characteristics enables prompt removal and reduces the risk of pathogen transmission.