Typically, we recommend doing gua sha no more than once a week in an area or after the “sha” has completely gone away. The “sha” is the reddish spots that appear if there is toxicity in the area.
The bright red bruising on the skin will fade immediately or in a couple of days depending on how long you have had the problem. The longer it takes for the bruising to go away the deeper the toxins are in the body, I’ve seen discoloration last up to 10 days.