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zanoii said:

While these solutions are great, the problem with these devices is that the glue that attaches them to the body is considered corporate secrets and is not examined by the FDA or similar authorities. This has lead to widespread skin hypersensitivity and rashes among users. 

The adhesive must become part of the FDA approval process.

Even if the adhesives becomes part of the FDA approval process. There is still a chance to a reaction you know like any other drug/vaccine the FDA clears. The amount of reactions are very slim. It happens but compared to the people that doesn’t get the hypersensitive is negligible.