D.O.M.S. (aka Delayed Onset Muscle Soreness) is a term that refers to muscle soreness after working out or exercising.
DOMS is the body's why of communicating with you to not exercise or move, because it is trying to heal or repair damaged tissues and/or cells. The body try to protect itself from injury so it makes our muscles tight and achy.
The BEST Way to Reduce DOMS is to do light or super low intensity movement. I.e. walking or light biking. This will help blood circulation and clean out the waste products in your cells.