It is not necessary to leave the microwave door open after taking out food to prevent overheating or burns. Modern microwave ovens are designed with safety features that prevent excessive heat buildup when the oven is not in use.
When you finish heating or cooking food in the microwave, it is generally safe to close the door immediately. The oven will naturally cool down on its own. However, if you are concerned about residual heat or steam, you can wait a few seconds to let it dissipate before removing the food or closing the door.
It's important to note that the exterior surfaces of a microwave oven can become warm during operation, especially if the oven has been running for an extended period or if it is located in a confined space. It's advisable to use caution and avoid touching the external surfaces immediately after use. If the exterior feels excessively hot, there may be an issue with the microwave's ventilation or internal components, and it is recommended to have it inspected by a qualified technician.