This is likely cognate to the popular Welsh girls' name Carys. The name is also that of an island in the Inner Hebrides island group, Scotland; Cara Island lying just off the southern tip of the Isle of Gigha. In Turkey the word Kara means dark, which may or may not be related to the Gaelic Ciara of the same meaning.
MRSA boils are a physical symptom that manifests in the presence of methicillin-resistant Staphylococcus aureus (MRSA) infection. Considered a form of dermal staph infection, MRSA boils present as progressive skin sores that form a boil of contained infection, which without proper treatment can lead to abscess formation.
The majority of people that get a MRSA infection get it from long term care facilities, kidney dialysis, injecting illegal drugs, or have had a recent surgery. Symptoms include red bumps that resemble pimples on the skin that eventually become large boils that reach deep into the skin.