Erythema

• The Center for Cancer notes that skin changes on the breast can signify carcinoma. If you develop skin erythema on your breast or breasts, lesions will appear and they will be surrounded by red rings that are called a bull's eye, iris or target. Vesicles may also appear. These are small, fluid-filled blisters (bullae).
  
  

Dimpling or Crustiness

• Dimpling of your breast skin or crustiness of your nipples can be an indicator of IBC. See your physician immediately.
  
  

Redness

• Cancer.org explains that redness of the nipple or breast skin or any skin irritation on the breast should be examined by your physician. Breast redness can be caused by a bacterial infection or inflammation of the breast, known as mastitis, according to Breasttalk.wordpress.com.
  
  

Dotted Skin

• If the skin on your breast becomes dotted like the skin of an orange this is called Peau d'orange and is an ominous sign, according to Family Practice Notebook. Peau d'orange is a sign of advanced breast cancer. The skin thickens and pits. The orange peel look of the skin is the result of edema (swelling) around the deepened hair follicles.
  
  

Thickening

• If the skin on your breast thickens, feels warm to the touch and turns red, this is another indicator that you may have a problem, which could be a breast infection but which could also indicate cancer.
  
  

Benign Skin Disorders

• Breast skin disorders do not automatically indicate breast cancer. They could be atopic dermatitis, contact dermatitis, neuro-dermatitis, psoriasis or seborrheic dermatitis. Eczema can involve the nipple and areola area. Your physician will need to determine if it is eczema or Paget's disease, which is a form of breast cancer.