What causes itchy armpits?

Itchy armpits can be caused by a variety of factors, including:

1. Skin irritation: This can be caused by shaving, deodorant, or certain fabrics, such as wool. Friction from tight clothing or activities that involve a lot of arm movement can also irritate the skin.

2. Sweat: Excessive sweating can cause the skin in the armpits to become damp and irritated, which can lead to itching.

3. Infection: Bacterial or fungal infections, such as ringworm or candidiasis, can cause itchy, red, and scaly skin.

4. Allergies: Some people may be allergic to certain ingredients in deodorants, soaps, or laundry detergents, which can cause itchy armpits.

5. Medical conditions: Certain medical conditions, such as eczema, psoriasis, and diabetes, can cause itchy skin, including in the armpits.

6. Stress: Stress can sometimes trigger or worsen itchy skin conditions, including armpit itching.