What does a wound from a subcutaneous tick look like? - briefly
A subcutaneous tick bite presents as a tiny puncture with a faint red halo, often showing a raised, dark nodule where the tick’s body lies beneath the skin. The site may be mildly swollen and feel tender or itchy.
What does a wound from a subcutaneous tick look like? - in detail
A wound produced by a tick that has migrated beneath the epidermis presents as a small, often circular or oval opening. The central punctum may be visible as a pinpoint depression or a faint, dark spot where the mouthparts remain embedded. Surrounding the entrance, the skin typically shows a raised, erythematous halo that can range from a few millimeters to several centimeters in diameter, depending on the duration of attachment.
Early lesions are generally painless, with minimal swelling. Over time, the area may become pruritic or tender, and the erythema can thicken, forming a firm, raised border. In some cases, the surrounding tissue develops a glossy, blanching appearance, while the central point may darken to a brown or black hue, indicating residual tick parts.
If secondary infection occurs, additional signs appear:
- Purulent discharge or crusting
- Increased warmth and swelling
- Expanding erythema beyond the original margin
- Localized fever or malaise
When a Borrelia infection is present, an annular rash (erythema migrans) may develop, characterized by a clear center and expanding red edge, often measuring 5–30 cm. The rash is typically flat or slightly raised, non‑pruritic, and may persist for weeks if untreated.
Removal of the tick’s head or mouthparts often leaves a tiny residual scar. Healing proceeds from the periphery inward, with gradual flattening of the raised border and fading of discoloration. Complete resolution may take several weeks; persistent redness, ulceration, or nodular formation warrants medical evaluation.