Armpit Rash Differential Diagnosis
Single Most Likely Diagnosis
- Contact Dermatitis: This is the most likely diagnosis due to the common occurrence of irritants or allergens in the armpit area, such as deodorants, soaps, or clothing. The rash is often itchy, red, and may blister.
Other Likely Diagnoses
- Eczema (Atopic Dermatitis): A chronic skin condition characterized by itchy, inflamed skin, which can occur in the armpits.
- Folliculitis: An infection of the hair follicles, often caused by bacteria, which can lead to red, itchy, and pus-filled bumps in the armpit area.
- Intertrigo: A skin infection that occurs in warm, moist areas of the body, such as the armpits, characterized by redness, itching, and burning.
- Seborrheic Dermatitis: A skin condition that causes scaly, itchy, and red patches, often in oily areas of the body, including the armpits.
Do Not Miss Diagnoses
- Cellulitis: A bacterial skin infection that can spread quickly and become life-threatening if not treated promptly. It is characterized by redness, swelling, and warmth of the skin.
- Abscess: A pocket of pus that can form in the armpit, often caused by a bacterial infection, which can lead to serious complications if not drained.
- Lymphoma: A type of cancer that can cause skin lesions, including in the armpit area, although this is a rare presentation.
Rare Diagnoses
- Pityriasis Rosea: A skin condition characterized by a rash that can occur in the armpits, although it is more commonly found on the trunk and limbs.
- Granuloma Gluteale Infantum: A rare skin condition that can cause lesions in the armpits, although it is more commonly associated with the diaper area.
- Fox-Fordyce Disease: A rare skin condition that causes itchy, dome-shaped bumps in the armpits, often associated with apocrine gland dysfunction.