20 year old male from Jaipur with erythermatous lesion on cheek with central crusting likely diagnosis is:
**Core Concept**
Erythema and crusting of a skin lesion on the cheek of a 20-year-old male from Jaipur suggests an infectious or inflammatory cause. The lesion's location and description are suggestive of impetigo, a common skin infection caused by bacteria such as Staphylococcus aureus or Streptococcus pyogenes.
**Why the Correct Answer is Right**
Impetigo is characterized by the presence of erythematous lesions with central crusting, often accompanied by a foul odor. This is due to the production of exfoliative toxins by Staphylococcus aureus, which cause the skin to blister and form a yellowish crust. Impetigo can spread through direct contact with the affected area or by touching contaminated objects. The lesion's location on the cheek may indicate that it was initially caused by scratching or touching the face.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** While acne can cause erythema and crusting, it typically does not present as a single, well-defined lesion on the cheek. Acne is also more common in adolescents and young adults.
**Option C:** Erysipelas is a type of bacterial skin infection that presents as a sharply demarcated, erythematous plaque, often with a higher fever than impetigo. It typically involves the face, but also tends to spare the nose and mouth.
**Clinical Pearl / High-Yield Fact**
When treating skin infections like impetigo, it's essential to cover the entire affected area with a topical antibiotic ointment and to wash the hands thoroughly after applying it.
**Correct Answer: C. Erysipelas**