Many underwear bras on the market are made of chemical fibre fabrics, and long-term wear by women may lead to poor local sweating of the breasts, poor skin permeability and long-term irritation leading to symptoms such as eczema and pimples on the breasts, which in turn cause itchy skin.
In addition, the various glands and tissues in the breasts secrete oil-like substances that accumulate on the skin surface of the breasts, and wearing a bra for a long time is not conducive to the cleaning of such substances, which can also stimulate the itchy skin. Due to local sweating and poor skin permeability, fungal infections may also occur, leading to itchy breasts.