Differential Diagnosis for Swollen Red Bumps on Lower Abdomen Groin
- Single Most Likely Diagnosis
- Folliculitis: This is an inflammation of the hair follicles, often caused by bacterial infection, which can lead to swollen red bumps that may ooze pus. The groin area is a common site due to friction, sweat, and bacterial colonization.
- Other Likely Diagnoses
- Ingrown Hair (Pseudofolliculitis): Especially in areas where hair is shaved or plucked, ingrown hairs can cause red bumps and pus-filled lesions.
- Contact Dermatitis: An allergic reaction or irritation from substances like soaps, detergents, or fabrics can cause skin inflammation, leading to red, swollen bumps.
- Boils (Furuncles) or Carbuncles: These are infections of the hair follicle and surrounding skin, typically caused by Staphylococcus aureus, which can present as swollen, red, and sometimes pus-filled bumps.
- Do Not Miss Diagnoses
- Cellulitis: A bacterial skin infection that can cause redness, swelling, and warmth, often without a distinct border. It requires prompt antibiotic treatment to prevent spread.
- Abscess: A collection of pus that can develop in the skin or just beneath it, which may need to be drained. An abscess in the groin area could be a sign of a more serious underlying condition.
- Erythema Nodosum: A condition characterized by the sudden formation of painful, red lumps on the skin, often on the shins but can appear in the groin area, which can be associated with underlying infections, medications, or systemic diseases.
- Rare Diagnoses
- Hidradenitis Suppurativa: A chronic skin condition that involves recurrent red, tender bumps or abscesses in areas where skin folds occur, such as the groin. It's less common but can significantly impact quality of life.
- Kerion: A severe form of tinea capitis (ringworm of the scalp) that can rarely occur in the beard area or, even more rarely, in other body areas including the groin, leading to swollen, red, pus-filled lesions.