If the bruising is caused by trauma, stop all activities to avoid aggravation of the injury and small bruises can be treated without special treatment.
If the pain is severe, take painkillers or spray local painkillers under the guidance of a doctor, have an X-ray examination, etc. Do not massage the area to stimulate it as this may increase bleeding and aggravate the condition. Without a history of trauma, recurrent bruising needs to be seen in hospital first for a clear diagnosis before treatment.