Differential Diagnosis for Temporal Facial Swelling
Single Most Likely Diagnosis
- Folliculitis or Razor Burn: This is the most likely diagnosis given the history of shaving and exfoliating the sideburns. The lack of erythema or warmth suggests a mild reaction, which is consistent with folliculitis or razor burn.
Other Likely Diagnoses
- Contact Dermatitis: This could be due to an allergic reaction to the shaving cream, aftershave, or exfoliating product used. The absence of erythema or warmth does not rule out contact dermatitis, as some forms can present with minimal inflammation.
- Ingrown Hair (Pseudofolliculitis Barbae): This condition occurs when hairs curl back into the skin, causing inflammation. It's common in areas where the hair is curly and the skin is shaved, such as the sideburns.
- Acne: Exfoliating can sometimes cause acne lesions to become inflamed, leading to swelling. If the patient has a history of acne, this could be a contributing factor.
Do Not Miss Diagnoses
- Cellulitis: Although less likely given the lack of erythema or warmth, cellulitis is a serious infection that requires prompt antibiotic treatment. It's crucial to consider this diagnosis, especially if the swelling is increasing or if the patient has a fever.
- Parotid Gland Infection or Abscess: Infections of the parotid gland can cause swelling in the temporal and facial area. This would be a more serious condition requiring medical attention.
Rare Diagnoses
- Lymphoma or Other Malignancies: Although extremely rare, certain malignancies can cause localized swelling without other symptoms. This would be considered only after other diagnoses have been ruled out and in the context of other systemic symptoms or risk factors.
- Sarcoidosis: This autoimmune disease can cause granulomatous inflammation in various parts of the body, including the skin, and might present with swelling. However, it would typically be associated with other systemic symptoms or findings.