Warning: LONG post.
Here's my symptom list, aside from ones too infrequent or once upon a time to mention, ones that stopped (like my penis pain, that probably was my UTI) or ones I just forgot at this point.
Scrotum/testicle pain (admittedly alot less common/constant these days, like my brain gave up on sending signals for something that isn't getting fixed).
Erectile dysfunction.
Testicular atrophy (but they unshrink and re-shrink back and forth at random).
Completely numb genitals, pleasure-wise anyways, I can still like tell they're on my body though mind you.
Back pain on the left side up high around my shoulders when sitting upright that temporarily leaves if I lay flat on my back (I guess a little more like pins and needles than pain though? I don't know what to call it), it similar to like when your foot goes to sleep but more annoying and constant.
My brain/head actually tingles sometimes, might just be my hair growing or something I dunno, I just started actually taking care of it recently lol.
Fatigue.
Frequent urination (then other times nothing almost the whole day, depends on what and how much I drink, water goes right through me).
Have to switch feet or stand on just one foot for a sec when standing to stop the pain.
Leg/knee pain (usually just one or the other).
Butt pain when standing up.
Leg pain/stiffness after standing in one spot a while (like washing dishes).
Back pain when standing but lower (about in the middle).
Very little semen and it's watery (if I can force anything out) more often than not.
TERRIBLE Memory problems.
General brain fog.
Man-boobs.
Seems like I can't breathe deeply.
Can't add any force to Pee stream.
Peeing pink??? (blood??) at random.
I blow my nose almost every day without fail (only once or so in that day if I'm lucky), the snot can be anything from clear to yellowish, to blue-greenish, to brown-red/pinkish.
Hyperhidrosis (armpits sweat way too much).
The erections I do get only happen when I touch myself.
Scrotum/testicle "pain"(???), hard to tell which but probably both (this has gotten very uncommon).
Urge to pee that's way too strong for the small amount that comes out sometimes.
Strange Behavior(s).
Weird hand twitch when typing on computer sometimes, it's like a weird mix between my hand jerking/jolting but fighting itself not to at the same time, that's the best way I can describe it, can happen to either/both arms/hands at the same time.
Weird superpower where I can practically go on forever without drinking any water or just a few sips whenever I do actually get thirsty (possibly due to barely any every coming back out more often than having a fountain these days), seriously I thought that killed people.
Constipation.
Lexapro 10MG helps the pain and oddly makes testicles grow kinda but not for long/it still varies? (probably coincidence).
Similar lump(???) on both testicles (could just be epididymis, would explain the bigger left since they said I have epididymitis on that side).
Perineum pain sometimes.
Testicles always shrink before I pee/poop, even worse than they already were.
Almost none of these are constant and consistency varies from symptom to symptom, and I'm always better or worse at certain times and testosterone levels fluctuate so hmm?
Did testicle ultrasound, neurologist (unknown brain scan), endocrinologist (hormone test), ureteroscopy (dumb female doctor thought "my hole" was a little too small, that's what I get only mentioning peeing alot), x-ray (I said full body, don't know how much they covered while I was standing there), you name it honestly, never got around to MRI/CT scan type machines though because of what you have to do for insurance to even cover it, never got around to checking out my prostate either.
Only the testicle ultrasound showed anything, a harmless small hydrocele on one side (maybe both I forgot) that I would've never even noticed in any way (not even aesthetic trouble) and left side epididymitis but to me the symptoms (among other things, like no way for me to get the infection kind) don't even remotely line up, having a UTI just once and symptoms like peeing alot that could be any number of 5+ different things aside, and I'm not sure how different symptoms are for each kind (infection or just inflammation due to whatever).
I've eliminated other things that cause low testosterone/testicular atrophy like diabetes and sickle cell, I'd definitely notice if I had those and probably be dead due to no treatment for 3 years, probably would have been gotten the problem diagnosed in a hospital.
Do you think my iron deficiency anemia could have something to with it (doubt it after all this time of not even having so much as a energy shortage with it).
Interestingly enough I layed (oops, laid) on my back during the ultrasound and they say that can cause a misdiagnosis as epididymitis (SOMEHOW).
I'm considering multiple sclerosis due to some similar symptoms and cause I did have pneumonia and strep throat (I think) at the same time once and I'd say this all started shortly after that and my symptoms are changing/vary in severity kinda, better in some ways worse in others, but multiple sclerosis probably (definitely) isn't the only thing that can change with time, I was 16 back then and 19 now after all, and as I said earlier testosterone does fluctuate.
I'm basically done with doctors until I can at-least get a answer or two on here on what I should even look for.
Depending on what kind of brain scan you had, they would have seen the damage to the central nervous system to diagnose it.
According to the National MS Society, you have to have these to diagnose MS:
*Find evidence of damage in at least two separate areas of the central nervous system (CNS), which includes the brain, spinal cord and optic nerves AND
*Find evidence that the damage occurred at different points in time AND
*Rule out all other possible diagnoses
https://www.nationalmssociety.org/Symptoms-Diagnosis/Diagnosing-MS
It's for sure a process.
Varicoceles don't cause symptoms anywhere except the groin area.
"The top 5 signs of a varicocele include:
*Scrotal mass: Lumps in one of the testicles.
*Heavy sensation: Swelling in the scrotum that is aggravated by lifting weights.
*Veins: Enlarged or twisted veins that are quite noticeable.
*Pain: Dull or sharp recurring ache in the scrotum with the pain gradually worsening throughout the day or with physical exertion. When you lie on your back, you feel better.
*Infertility, impotence, and spermatorrhea (involuntary ejaculation): Typically, men with varicoceles have lower or impaired testosterone production. Some men who have varicoceles have erectile dysfunction and reduced virility."
https://www.medicinenet.com/what_are_the_5_signs_of_a_varicocele/article.htm
One thing that's concerning is that you think going without water is some kind of power or good thing. There is debate on how long you can go without water - some say up to 3 days, some up to 2 weeks but all agree that you'd be dehydrated. Some of what you are experiencing may be dehydration.
Excessive sweating is a sign of dehydration, and muscle aches and pains are another.
Losing just 2% of the water in your body can lead to serious cognitive issues and brain fog. (https://www.bbc.co.uk/food/articles/brain_fog)
Iron anemia can absolutely cause some of these symptoms. Fatigue can be caused by both anemia and dehydration.
Maybe for a week, try drinking enough water, and see how you feel. You don't mention the anemia until the end of your post, so I don't know if it's bad enough for infusions, or just that you need to eat more iron, or take supplements, but if it's just to increase your iron, try that, too.
I don't think it will help everything, but it may help some things, enough for you to determine what's what, and what you need to investigate further.