What does the skin look like with a subcutaneous tick? - briefly
The affected site usually presents as a firm, slightly raised nodule or papule, often reddish or skin‑colored, sometimes with a tiny central punctum marking the entry point. If part of the parasite remains visible, a small dark speck may be seen at the center of the lesion.
What does the skin look like with a subcutaneous tick? - in detail
The skin over a tick that has penetrated below the epidermis presents a distinct, localized lesion. The area is usually raised, forming a small nodule or papule that may feel firm to the touch. The surrounding tissue often shows a faint halo of redness (erythema) that can extend a few millimeters from the center. At the apex of the nodule, a tiny puncture opening—sometimes called a punctum—may be visible, through which the tick’s mouthparts remain attached to the host.
Key visual characteristics include:
- Color: Light pink to reddish‑brown; the central point may appear darker due to the tick’s body or hemorrhage.
- Size: Typically 2–8 mm in diameter, depending on the tick’s developmental stage and duration of attachment.
- Surface texture: Smooth to slightly rough; the overlying skin may be taut because of underlying inflammation.
- Swelling: Localized edema can cause the lesion to feel slightly edematous; in some cases, a clear or serous fluid may accumulate, creating a tiny blister‑like appearance.
- Movement: The tick itself is not visible externally, but subtle shifting of the central punctum may be observed as the parasite adjusts its position.
Additional observations:
- Temporal changes: Early stages show minimal discoloration; as the tick feeds, the lesion enlarges and the surrounding erythema becomes more pronounced. After removal, the nodule may persist for several days, gradually flattening and fading.
- Location‑specific variation: Areas with thinner skin (e.g., scalp, eyelids) may exhibit a more translucent appearance, while thicker regions (e.g., thighs, back) produce a more pronounced bump.
- Potential secondary signs: Secondary infection can introduce purulent discharge, increased warmth, or expanding redness, indicating the need for medical evaluation.
Recognition of these features enables accurate identification of a subdermal tick attachment and guides appropriate removal and follow‑up care.