An apparatus and means of detecting tissue conditions conducive to pressure ulcer formation and reversing these conditions which includes the steps of: noninvasively detecting tissue parameters indicative of tissue health, calculating when these conditions fall outside normal healthy physiological ranges in such a manner that indicates future formation of a pressure ulcer, and in such a situation applying therapeutic stimulation to normalize tissue physiological condition. Said apparatus and method comprise a single, wearable unit. The device can be used in bed or in a wheelchair to treat and prevent the development of pressure ulcers.