Differential Diagnosis for Blanchable Redness to Coccyx
- Single most likely diagnosis
- Pressure ulcer (stage 1): This is the most likely diagnosis because blanchable redness is a hallmark of early pressure ulcer formation, and the coccyx is a common site for pressure ulcers due to prolonged pressure in individuals who are bedridden or have limited mobility.
- Other Likely diagnoses
- Friction burn: Friction can cause redness and irritation, especially over bony prominences like the coccyx. This could be due to repetitive motion or pressure against the skin.
- Skin irritation/allergic reaction: Irritation from soaps, lotions, or other substances can cause redness, and the coccyx area can be prone to such reactions due to moisture and friction.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Infection (e.g., cellulitis, abscess): While less common as an initial presentation with blanchable redness, infections in this area can quickly become severe and require prompt antibiotic treatment.
- Deep vein thrombosis (DVT): Though DVT typically presents in the legs with swelling, pain, and warmth, in rare cases, it could cause skin changes due to decreased circulation, and missing this diagnosis could be fatal.
- Rare diagnoses
- Erythema ab igne: This condition is caused by prolonged exposure to heat (such as from a heating pad), leading to reticulated erythema and can occur in areas like the coccyx if heat is applied for pain relief.
- Vasculitis: Certain types of vasculitis can cause skin lesions and redness, though this would be an uncommon presentation for vasculitis and would likely be accompanied by other systemic symptoms.