A team of National University of Singapore researchers have developed an ‘add-on’ to a wearable health monitoring gadget that can tell users about the condition of their health from their sweat.
Sweat, which contains a wide range of biochemical markers, can tell us a lot about our health. Variations in sweat pH (i.e. acidity or alkalinity), for instance, can tell us whether our body is dehydrated and can aid the diagnosis of skin conditions such as dermatitis, acne and other skin infections. In diabetic patients, sweat pH may serve as a good indicator of other life-threatening conditions, for instance, a high sweat pH during excessive sweating and night sweating may have been caused by a prolonged period of low blood glucose that warrants medical intervention.
https://news.nus.edu.sg/research/low-power-highly-responsive-and-reusable-sweat-ph-monitor