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Question Bloody mucus after dry apnea

Thread Status: Hello , There was no answer in this thread for more than 60 days.
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Aug 19, 2019
I've been diving for a few months (level 1 certified). I often get bloody mucus while diving which I suspect is because of a ruptured sinus capillary due to pressure/equalization. This makes sense to me.

But recently I also noticed that I get bloody mucus discharges even after doing dry apnea (e.g. CO2 tables). Am I holding my breath properly? I try to use only my glotis to stop the air from leaving my lungs but there must be something else going on with the soft palate that leads to pressurization of the sinuses.

Any advice on what to try? What should I be doing with my soft palate (open? closed? neutral?) while doing CO2 tables?

Thank you.
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