Differential Diagnosis for Bed Bug Bite
- Single most likely diagnosis:
- Allergic reaction to bed bug bite: This is the most likely diagnosis as bed bug bites often cause an allergic reaction, leading to itching, redness, and swelling.
- Other Likely diagnoses:
- Flea bite: Flea bites can cause similar symptoms to bed bug bites, including itching and redness.
- Mosquito bite: Mosquito bites can also cause an allergic reaction, leading to itching and swelling.
- Contact dermatitis: Contact dermatitis can cause itching, redness, and swelling, similar to bed bug bites.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.):
- Scabies: Scabies is a parasitic infection that can cause severe itching and rash, and can be mistaken for bed bug bites.
- Lyme disease: Lyme disease is a bacterial infection transmitted by ticks, and can cause a rash and other symptoms that may be mistaken for bed bug bites.
- Rare diagnoses:
- Bullous pemphigoid: Bullous pemphigoid is a rare skin condition that can cause blistering and itching, and may be mistaken for bed bug bites.
- Erythema multiforme: Erythema multiforme is a rare skin condition that can cause a rash and other symptoms, and may be mistaken for bed bug bites.