Regarding your question we need to define what is "too much." The basic guideline for acupressure, you cannot use this technique on people unconscious, the area with open wound, infection, with or without fluid or puss coming out, black and blue, artificial joint and surgical metal that stays in the body. If you don't have all the above, then 2-3x a week for acupressure is fine.
Alexandre Hillairet, DAOM.
Where a patient can sometimes run into problems is with local bruising. This can render the area too tender for repeated acupressure and is one of the reasons acupuncture (using needles) is often much better tolerated - it's way more comfortable particularly in repeated treatment.