Very itchy breast skin during breastfeeding can be caused by acute mastitis, eczema, and contact dermatitis. 1. Acute mastitis: Acute mastitis due to the child sucking leads to milk stagnation and bacterial invasion, the patient will have breast pain, local redness, swelling, warm feeling, but also may be accompanied by itching, which is manifested in breastfeeding breast skin is very itchy. 2. Eczema: Eczema is a chronic inflammatory itchy skin disease, due to the local moisture, sweat, resulting in local symptoms of eczema, such as self-conscious intense itching, red spots, papules, etc., the patient thus appeared breastfeeding breast skin itchy symptoms. 3. Contact dermatitis: contact dermatitis is an inflammatory skin disease caused by skin contact with external substances, due to breastfeeding often wear breathable underwear, or allergic to certain materials in the underwear, will produce itching, burning, swelling and pain and other self-conscious symptoms, so that there is a breastfeeding breast skin very itchy performance. There are many causes of itchy breast skin during breastfeeding, it is recommended to go to the hospital in time to clarify the cause of the disease.