Smart sensors will have a variety of uses in the near future. They could send health data from inside your body to your doctor. Sensors could be embedded in a variety of form factors. One example is smart pills, which could use wireless technology to help monitor internal reactions to medications. Ingestible technology could incorporate either permanent or temporary sensors that you eat.
Another example is wearable sensors that might be worn as a watch or bracelet, embedded into clothes, or used as a tattoo-like patch that could be peeled off after use. Smart sensors will be able to gather data through skin contact as well as from inside the body and transmit that information wirelessly to smartphones and remote diagnostic facilities.
With advances in AI, real-time feedback is possible, and devices might be able to suggest corrective action without any human input. The Apple Watch is a good example of this in the present; it can alert you immediately if your heart rate is either too high or low based on a passive scan in the background. It also monitors you throughout the day, and if your heart rate starts to spike, it will suggest breathing exercises to calm you before you hit the warning threshold. Expect both more advanced testing and more elaborate feedback to come in the near future. A doctor should eventually review any abnormal data and should be consulted before taking any drastic action