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Dona you have not mentioned sites where you get these abscess
.You might need a long course of antibiotics in this case.Also you should apply creams like mupirocin
not only over these lesions but also over pri-oral area,peri-nasal area and peri-anal area. These are the sources of infection in chronic cases.
As far as marks are concerned ,there are certain group of patients who have tendency to develop pigmentation following a very trivial injury
.There are lot of medicated bleaching cream which can be used to reduce them.If marks on the exposed areas then don't forget to use a sun screen daily.