I don't know of any practical uses, although that doesn't mean there aren't any. It's gamma rays that are used in radiation treatments of cancer. Besides the observation of UV in astronomy, UV is probably used in some medical treatment of skin conditions. Infrared is also called heat rays. It is used to warm muscles, etc., during some treatments of medical conditions, or sports injuries, etc.
All radiation can probably cause some problems, in high enough doses.
But you need a high intensity. But we don't normally encounter such high levels of microwaves or visible light. A nice search engine to use is the Webcrawler .