What Causes a Rash on Your Neck?

Neck rashes typically result from skin irritation, allergic reactions, or underlying medical conditions. Contact dermatitis (either allergic or irritant) from jewelry, perfumes, clothing materials and other substances accounts for approximately 20% of neck rashes. Heat rash occurs when sweat ducts become blocked or inflamed, particularly common in humid conditions or tight clothing areas. Eczema and psoriasis can also manifest on the neck. More than 19 million Americans have eczema. Fungal infections can thrive in warm, moist neck folds, causing a rash. Other causes include bacterial infections, viral rashes, medication reactions, and autoimmune conditions. Poor hygiene, excessive sweating, and friction from clothing or accessories can worsen symptoms.