I've had POIS since around 12 years of age and I'm now 32.
My symptoms are brain fog, tiredness, weakness and so forth for between 12 and 24 hours after.
I noticed recently that when I'm around a girl I leak semen and my symptoms are worse than a full ejaculation.
This makes me think it must be something mechanical - with a full ejaculation the semen is forced out, whereas when it leaks out it exits slowly and perhaps has more chance to pass a membrane.
I'm considering speaking to a urologist although I'm not sure that's the right department.
The only cures I've found are 'New Mushroom Complex 6, 100% Organic Vital Mushroom Supplement by Wellgard - 2 Month Supply Mushroom Powder, Chaga Mushroom, Reishi Mushroom, Lions Mane Mushroom, Not Capsules, Made in UK'.
I've tried diclofenac also which is a strong anti-inflammatory but it concerns me that it's bad for one's stomach lining.
It's such an embarassing illness but I will get to the bottom of it, even if it's when I'm loads older!