In the wake of centuries of global battle against contagious diseases, the COVID-19 pandemic emerged as a tough enemy, profoundly impacting lives worldwide, including Bangladesh. Many have faced short-term and long-term complications, as evidenced by numerous studies. This study investigates the physical and mental complications experienced by post-COVID-19 patients in Bangladesh. Utilizing a mixed-method approach, which includes both statistical analysis and the examination of secondary and primary data, we assess the prevalence and impact of these complications. Physical complications include hair loss, dizziness, palpitations, and loss of appetite, suggesting a lasting impact of COVID-19 on physical health. Mental complications, such as depression, anxiety, and memory problems are prevalent. Importantly, mental complications appear to affect post-COVID-19 patients more than physical complications. These findings emphasize the need for comprehensive post-recovery care that addresses both physical and mental health. Public awareness campaigns and mental health support resources should be prioritized. Further research is essential for the effective management of post-COVID-19 complications.