Could a get mrsa again just 6 months later?

Yes: There are several reasons why MRSA infections of the skin return. Chronic skin conditions such as eczema & psoriasis may promote repeat MRSA infections. Individuals who experience frequent skin abrasions or cuts risk repeat MRSA infection. Itching disorders or people who have a habit of scratching their skin are also at risk for returning mrsa. The other problem is MRSA "colonization" (see below).

"colonization" risk: After an initial MRSA infection there is a high risk for a person to develop MRSA as "normal" bacteria on their skin or fingernails. In fact, about 1% of the general public in the USA has MRSA as a "normal" bacteria in their nose. This is also called "colonization". Colonized MRSA patients are at a high risk for recurrent infection.

Can happen: Possible to develop recurrent MRSA infection at some point in the future after having had MRSA infection at a different site on your body. There is some evidence that a patient who has community-type MRSA infection is more likely to have recurrent skin infection than a patient who had a non-MRSA staph infection.