Abstract
A 45-year-old man on public welfare, who had been visiting a psychiatric hospital for schizoaffective disorder, began working as a package delivery person for the first time in the morning after receiving welfare. In the afternoon, he noticed pain in his lower back. By evening, he was unable to move, prompting an emergency call and transportation to our hospital. Blood tests revealed renal damage and elevated creatine kinase (CK) levels, resulting in hospitalization. Although he received fluid replacement after admission, he did not urinate, and his CK levels increased to 420,000 U/L, necessitating hemodialysis. Subsequently, his CK levels gradually improved over time, accompanied by increased urine output. Approximately three weeks after initiating hemodialysis, he was weaned off the treatment and discharged home 40 days after admission.