It's not a tension headache. Serotonin affects bloodflow in your brain, which is why many migraine drugs target its receptors. The headache is a known effect, a

It's not a tension headache. Serotonin affects bloodflow in your brain, which is why many migraine drugs target its receptors. The headache is a known effect, although I never in all of my drug fueled years on earth heard of it until I started experiencing it myself after 5g+ shroom trips. Usually it hits us the day after and no amount of water, neti pots, magnesium, etc will help. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3345296/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3345296/