Differential Diagnosis for Red Bumps on Lower Abdomen and Groin
Single Most Likely Diagnosis
- Folliculitis: This is an inflammation of the hair follicles, often caused by bacterial or fungal infections. It's a common condition that can occur in areas with high hair density, such as the groin, and is characterized by red, itchy bumps.
Other Likely Diagnoses
- Contact Dermatitis: An allergic reaction or irritation caused by substances like soaps, detergents, or fabrics, leading to red, itchy bumps on the skin.
- Keratosis Pilaris: A harmless condition that causes small, rough bumps on the skin, often on the thighs, arms, and buttocks, due to keratin buildup in the hair follicles.
- Ingrown Hairs: Hair that grows back into the skin can cause red, painful bumps, especially in areas with curly hair, such as the groin.
- Heat Rash (Miliaria): A condition caused by blocked sweat ducts, leading to small, itchy red bumps, often in warm, humid environments.
Do Not Miss Diagnoses
- Cellulitis: A bacterial skin infection that can cause redness, swelling, and warmth, potentially leading to serious complications if left untreated.
- Erythema Nodosum: A condition characterized by painful red nodules, often on the shins, but can occur on the abdomen and groin, associated with various underlying conditions, including infections and autoimmune disorders.
- Herpes Simplex Virus (HSV): A viral infection that can cause painful blisters or bumps, especially in the genital area, which can have significant implications for sexual health.
Rare Diagnoses
- Hidradenitis Suppurativa: A chronic skin condition that causes painful, inflamed bumps in areas with apocrine glands, such as the groin and armpits.
- Granuloma Inguinale (Donovanosis): A rare bacterial infection that causes ulcerative lesions, often in the genital area.
- Lichen Planus: A chronic inflammatory condition that can cause purplish, itchy bumps on the skin, including the groin area.