system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When I'm sick, why does masturbating temporally decongest my sinuses?
gpt
**It's actually not a blood flow thing as the other guy said.** It has to do with Norepinephrine being released when you orgasm. Obviously just having a boner doesn't decongest your sinuses, but orgasming does. When you orgasm lots of neurotransmitters are released into your brain, one of them is norepinephrine. Norepinephrine constricts the blood vessels, which prevents fluid from blood vessels going into your mucous membranes, which leads to less mucous production and decongestion.

Edit:     **Norepinephrine is exactly the same thing that is released in the most powerful decongestants like Sudafed (pseudoephedrine), that is why they have the same effect**