2. Results
muscle contraction
ADVERSE EVENTS, SCAR, PREMATURE VENTRICULAR CONTRACTIONS
The study included 15 female-to-male patients. Thirteen patients (accounting for 26 surgical scars) successfully completed the study until its conclusion, while 2 patients were lost to follow-up at the 3-month mark because of personal inconvenience with the follow-up schedule; the attrition did not relate to the treatment protocol or any adverse events (Notably, all patients were right-hand dominant. Hand-side dominance may indirectly contribute to an increased tendency for scar formation on the dominant side. This is because the dominant side often experiences greater skin tension, muscle contraction, and movement. Among the participants, one patient had a history of premature ventricular contractions and was currently taking medication. Additionally, all patients had Fitzpatrick phototype 3 or 4. A single patient had a previous history of keloid formation on their right hand. The baseline assessment scores between the two groups, as shown in 