@shirljk
I have heard this as a long covid symptom and that covid affects hormones and nerves. For women, I wonder if covid causes a hot flash type of symptom along with small nerve fibers and thyroid that help regulate body temperature.

Have you had recent bloodwork to check your thyroid function (full panels, not just TSH)?

Have you seen a neurologist for a neuropathy blood panel plus small fiber neuropathy skin punch biopsy from thigh/ankle?
1.
https://lifemedicallab.com/health/post-covid-heat-intolerance/
2. https://oasismedicalinstitute.com/covid-heat-intolerance/
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC7849778/
4. https://biologyinsights.com/does-covid-affect-body-temperature-regulation/
5. https://pmc.ncbi.nlm.nih.gov/articles/PMC10215572/
6. https://connect.mayoclinic.org/discussion/regulating-body-temp/?pg=4
7. https://www.mountsinai.org/about/newsroom/2023/people-with-long-covid-have-distinct-hormonal-and-immune-differences-from-those-without-this-condition