What does a subcutaneous tick look like on a human's skin? - briefly
A subcutaneous tick presents as a tiny, firm, raised nodule, often dark brown or black, sometimes resembling a small mole, with a central puncture point that may be visible as a tiny dot. The surrounding skin is usually intact, without the typical attached legs of an external tick.
What does a subcutaneous tick look like on a human's skin? - in detail
A tick that has penetrated beneath the epidermis presents as a localized, often circular, raised area. The lesion typically measures 5–10 mm in diameter, matching the engorged body of the arthropod. The surface may appear smooth or slightly textured, reflecting the tick’s hardened dorsal shield (scutum). Color ranges from dark brown to reddish‑black, depending on species and degree of blood intake.
Key visual indicators include:
- A central punctum or tiny opening where the mouthparts anchor to tissue; this may appear as a pinpoint depression.
- A peripheral halo of mild erythema, sometimes faint, caused by inflammatory response.
- Slight edema surrounding the core, giving the area a “bump‑like” feel on palpation.
- Absence of a visible external exoskeleton; the tick is hidden, so the skin surface does not display the characteristic legs or body segments.
In later stages, as the tick expands, the lesion can become more pronounced, with increased swelling and a deeper, darker coloration. The surrounding skin may develop a thin, translucent film as fluid accumulates. If the tick detaches prematurely, a small ulcer or crust may remain at the punctum site.
Recognition relies on noting the combination of a well‑defined, raised nodule, central puncture point, and localized discoloration without an overt external arthropod. Prompt identification allows appropriate removal and reduces risk of pathogen transmission.