Bruised ribs are notorious for their long healing time. Unfortunately, unlike other bones of the body, ribs cannot be placed in a cast, which is why we need to wait for them to heal on their own. Typical healing time for bruised ribs is anywhere between 3 to 6 weeks.However, some may take even longer. The actual healing time required will vary depending on the severity of the bruise and muscle injury.ruised ribs indicate an injury to the muscles surrounding the ribs rather than the ribs themselves. Bruised ribs heal on their own, and only small measures to promote healing can be undertaken.