There is a possibility that infants carrying infectious pathogens in their noses can infect their mothers; the clinical significance of this finding is still unknown. Mastitis and breast abscesses can also be caused by direct trauma to the breast. Such injury can occur for example during sports activities or due to seat belt injury. Mastitis can also develop due to contamination of a breast implant or any other foreign body, for example after nipple piercing. In such cases, the removal of the foreign body is indicated.Women who are breastfeeding are at risk for developing mastitis especially if they have sore or cracked nipples or have had mastitis before while breastfeeding another baby. Also, the chances of getting mastitis increases if women use only one position to breastfeed or wear a tight-fitting bra, which may restrict milk flow  Difficulties in getting a nursing infant to latch on to the breast can also increase the risk for mastitis.Women with diabetes, chronic illness, AIDS, or an impaired immune system may be more susceptible to the development of mastitis. Infection
Some women (approximately 15%) will require antibiotic treatment for infection which is usually caused by bacteria from the skin or the babys mouth entering the milk ducts through skin lesions of the nipple or through the opening of the nipple. Infection is usually caused by Staphylococcus aureus. Infectious pathogens commonly associated with mastitis are Staphylococcus aureus, Streptococcus spp. and Gram-negative bacilli such as Escherichia coli.
Elastosis perforans serpiginosa is a unique perforating disorder characterized by transepidermal elimination of elastic fibers and distinctive clinical lesions, which are serpiginous in distribution and can be associated with specific diseases. See also
List of cutaneous conditions
Poikiloderma vasculare atrophicans

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