Pruritus, post traumatic stress disorder and perceived stress are common issues in burn patients. The correlation between the three is unclear so far.

This study will collect data among adult patients with hypertrophic scars 21 days after the burn event has occurred. Using a Chinese version of the 5D itch scale,Chinese version of the posttraumatic diagnostic scale and Perceived Stress Scale to investigate self-reported postburn pruritus,post traumatic stress disorder and perceived stress. The patients will be wearing the smart watch for one month to collect data on their stress levels. This data will be used to analyze the correlation between posttraumatic stress syndrome, perceived stress and scar pruritus. There will be two rounds of data collection. The first will be when the smart watch is issued to patients, and the second will be at the end of the one month period.

Inclusion Criteria:

• Patients with hypertrophic scars 21 days after the burn event occurred
• Adult patients over 18 years old
• Patients without serious mental disorders, and are able to express themselves in Chinese with clear consciousness.
• The patient has no open wound on the wrist and is able to wear the smart watch continuously for one month

Exclusion Criteria:

• Patients with first-degree burns
• Non-traumatic electrical burns

• Patients with hypertrophic scars 3 months after the burn event occurred
• Adult patients over 18 years old
• Patients without serious mental disorders, and are able to express themselves in Chinese with clear consciousness.
• The patient has no open wound on the wrist and is able to wear the smart watch continuously for one month