While direct radiation exposure, especially ionizing radiation, can be dangerous, microwaves are very safe. Though it’s generally recommended not to press your body against the microwave while it’s heating food (not that we think you would), you don’t need to be concerned about radiation poisoning over time. The FDA has regulated microwave manufacturing since the ’70s to make sure models are protected against leakage. That being said, if your microwave is damaged in any way, it is best to take it to a professional to be safe.