There is no evidence to support the claim that Trump was wearing a TENS device during the first presidential debate of 2020.
The debate let to many conspiracy theories made around both the candidates. It was speculated that Trump was wearing a Transcutaneous electrical nerve stimulator(TENS) device during the debate. Various photos captured during the debate and the videos did not feature Trump wearing any stimulator onto his body at any point in the debate. The news was also not published in any of the leading media outlets to further support the claim.