<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>ehnto</author><text>You could have some kind of malformation or inflammation from your injury causing a build up of cerebral fluid, so when you move it&amp;#x27;s able to rush past into the spine and make the funky fluid noises. In perfectly healthy people, the flow is controlled by a sort of tonsil, and during movement or laughing&amp;#x2F;coughing it is able to escape into the spine as well. In people who have a malformation from birth, it can cause all kinds of physical developmental issues like lopsided muscle reactions, scoliosis and such. It also gets worse and worse, not better.&lt;p&gt;I&amp;#x27;m not a doctor, just had a close family member with a malformation there which was corrected with surgery. You should really see a specialist!</text><parent_chain><item><author>gentleman11</author><text>I was in a car accident once and injured my neck. I got a lot of mental fatigue afterwards and in particular the angle of my neck can trigger a lot of tiredness very quickly and reliably. It comes with a swooshing squirting sound in the back of my head... iirc other people can hear it too when it happens.&lt;p&gt;I can’t help but wonder if it’s related to this rinse system in some way. Luckily it has improved a ton over the years but a bent neck still triggers it and I never found out why</text></item></parent_chain></comment><story><title>Discovering the brain’s nightly “rinse cycle”</title><url>https://directorsblog.nih.gov/2020/03/05/discovering-the-brains-nightly-rinse-cycle/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>2bitencryption</author><text>When I have a migraine, and the excedrin (migraine medication) begins to kick in, I also notice this exact sensation&amp;#x2F;&amp;quot;sound&amp;quot;, like a draining, as a pressure in my skull begins to be relieved.&lt;p&gt;Obviously this is purely anecdotal and not scientific at all, but it&amp;#x27;s fun to speculate. I like concepts that are intuitive, and this one seems pretty intuitive to me.</text><parent_chain><item><author>gentleman11</author><text>I was in a car accident once and injured my neck. I got a lot of mental fatigue afterwards and in particular the angle of my neck can trigger a lot of tiredness very quickly and reliably. It comes with a swooshing squirting sound in the back of my head... iirc other people can hear it too when it happens.&lt;p&gt;I can’t help but wonder if it’s related to this rinse system in some way. Luckily it has improved a ton over the years but a bent neck still triggers it and I never found out why</text></item></parent_chain></comment><story><title>Discovering the brain’s nightly “rinse cycle”</title><url>https://directorsblog.nih.gov/2020/03/05/discovering-the-brains-nightly-rinse-cycle/</url></story>