Wearable thermal sensors

A system for monitoring subdermal fluid infiltration, comprising:

• a flexible substrate configured to be adhered to a skin surface;
• at least six temperature sensors supported by the flexible substrate and arranged spatially in a first array;
• at least three thermal actuators supported by the flexible substrate and arranged spatially in a second array;
• an adhesive substrate supported by the flexible substrate;
• a power source configured to supply power to the at least six temperature sensors and to the at least three thermal actuators;
• a memory storage device;
• and
• a microprocessor in communication with the memory storage device and configured to:
• activate the power source to supply power to at least one of the at least three thermal actuators to cause heating of a subdermal fluid;
• receive information associated with a temperature of the subdermal fluid from at least one of the at least six temperature sensors;
• calculate an alert condition based on a set of instructions received from a memory storage device and the temperature of the subdermal fluid;
• and
• trigger an alert if the alert condition is met.