1. A system for generating an alert based on a blood pressure value, the system comprising: an adhesive patch sensor comprising 1) an optical system comprising a light-emitting diode which emits an optical wavelength, and a photodetector that detects reflected radiation from the light-emitting diode to generate a radiation-induced photocurrent, 2) an electrical system comprising an electrode that generates an electrical impulse from the patient's skin, and 3) an adhesive component for adhering the adhesive patch sensor to the patient's skin; a processing component, in communication with the adhesive patch sensor, comprising 1) means for generating an optical waveform from the radiation-induced photocurrent, 2) means for generating an electrical waveform from the electrical impulse, 3) a microcontroller configured to operate an algorithm that determines a blood pressure value of the patient by processing the optical and electrical waveforms and at least one calibration parameter, and 4) means for generating an alert based on the patient's blood pressure value.