The first question is: do you want to be bruised? Healthy relationships require open and honest communication, this is doubly important in relationships that are BDSM.

If you don't want the bruising, you need to tell him and you need to use your safeword/

If you do like receiving the pain but not the bruises, use arnica gel to speed up the healing.

If you like receiving them, enjoy wearing the marks that he enjoys leaving, I don't see a problem with both of you getting what you want.

Communicate, communicate, communicate!