Why Does My Bra Leave Dark Marks Under My Breasts? Find Out Here

Dark marks under the breast caused by bras are often due to friction, moisture, or an ill-fitting bra. When a bra is too tight, it can rub against the skin, causing irritation and hyperpigmentation. Moisture trapped under the breasts, especially in warmer climates, can also lead to dark marks due to chafing and bacterial growth.