A bad night's sleep may result in a spike in blood pressure that night and the following day.
Resources
https://www.eurekalert.org/pub_releases/2019-06/uoa-snl060419.php
https://www.acponline.org/acp-newsroom/acp-recommends-cognitive-behavioral-therapy-as-initial-treatment-for-chronic-insomnia
https://journals.lww.com/psychosomaticmedicine/Abstract/2019/07000/Associations_Between_Objective_Sleep_and.9.aspx