The comments about your tan, etc. are compliments to you, probably very pleased to know you are getting out and exercising, etc. Those are very healthy self-care activities. Accept it as a compliment.

The comments about the bruises is probably just curiosity particularly if they were dark or numerous. People notice those kinds of things, particularly T's. Heck, even my students notice if I have a bruise or a scrape on my arm or something different like that. (Sometimes I like to entertain them with elaborate and completely fictional accounts about my war wounds. They love how long it takes some of their peers to finally figure out I'm telling a tall tale).