Bandages are usually very mysterious -- it's hard to know how well you're healing until you unwrap them, and that usually means a trip to the doctor. If Welsh researchers succeed, however, you'll never have to wonder what's going on underneath all that cloth. Swansea University is planning trials (due within 12 months) of smart, 3D-printed bandages that will use 5G wireless data and nano-sized sensors to constantly relay details about your health. It would help physicians customize treatment based on the progress of your wound, your location and your activity. If you're healing well and are staying active, for example, you may get a different solution than someone who's recovering slowly and needs to stay home.