Why does granulation tissue turn purple after microwave treatment?

The granuloma turning purple after microwave treatment is usually a local tissue reaction caused by the thermal effect during the microwave therapy. Granulomas themselves are inflammatory masses. Although microwave therapy is a non-invasive treatment, it may produce certain thermal stimulation to the surrounding tissues during the treatment process, thereby causing changes in local blood circulation and tissue congestion. This congestion may manifest as a purpling of the granuloma area and is a common phenomenon after microwave treatment. It should be noted that microwave therapy may not have a significant effect on granulomas, and individual variations exist. If the granuloma turns purple after microwave treatment and is accompanied by other discomfort symptoms such as increased pain or swelling, it is recommended to seek medical attention promptly to evaluate the treatment outcome and determine whether modification of the treatment plan is necessary. Meanwhile, maintaining local cleanliness and hygiene during the treatment process is important to avoid infection and other complications.