I have 4 to 5 forms of synesthesia and one of them only occurs in 1-4 % of the population

I have perfect pitch.

I have a couple of things. The double row of eyelashes which isn’t that rare but saves me from mascara. And I metabolise medication supremely fast. Local anaesthetic is noticeably fast. As in my dentist has to readminister 3 or 4 times for one filling, my dermatologist 3 times for a mole removal. Most of my family (maternal) are the same. But it doesn’t work with weight. I wish!

My kidneys face the wrong way

I have Cold Urticaria, along with Chronic hives which make it worse. I don’t exactly have dermatographia, if I get scratched or hit then I get hives lol

I have a vertebral border shift so I have 6 lumbar vertebrae (lower back vertebrae) rather than 5. When working as an archaeologist relocating a cemetery, I excavated a skeleton with exactly the same condition! Most people with this doesn’t have issues, but it does cause me some lower back problems if I’m not consistent with physio exercises.

I was born with a serious brain malformation (rare), had 5/5 things against me (some scale they use to consider the severity) (more rare), has the highest dose of radiation treatment ever (at the time) (rarer), and agree 23 years of treatment, it's gone! (Extremely rare).

I have allodinia so my femurs are gradually twisting until it gets to a point when I can barely walk. I also can echolocate. I have yellow cones.

I've got dimples on my shoulders, knees and elbows. My mum and I both have the same spinal deformity, our vertebrae are smaller than they should be. My mum also has an extra liver, it's half the size of a normal liver but completely functional.

My granddad was Born in 1924, my dad in 1954, I was in 1984 and my son in 2014. Exactly 30 years apart. In addition my son and my dad was Born on the same month and day as well.

I have natural red hair & blue eyes

Another oddity I have is pseudocholinesterase deficiency. It means I don't metabolize certain drugs used in anaesthesia--Succinylcholine and anything ending in "aine" as in Benzocaine, Cocaine, etc. Unfortunately we discovered this the hard way. I had been administered Succinycholine as a supposedly short-acting paralytic inorder to be intubated. But at the end of the surgery I was still paralyzed. I was extubated only to find that I was unable to breathe on my own, nor could I speak or gesture in any way. So I was totally aware that I was suffocating but unable to indicate it. Fortunately I was hooked up to machines that measure my vitals so I was quickly re-intubated. I was immediately whisked off to the ICU for observation and recovery. After I was discharged from the hospital, my anaesthesiologist called to apologize. He told me that in his 25 yrs practicing he'd never encountered it before, and that he'd probably not see it for the next 25 yrs.

When I was young and stupid and mad at the world in my 20s, I was exposed to a highly communicable disease many times. By all means I should have gotten it. After I smartened up and went to get tested, I assumed it would be positive and I was ready for it. The test was negative and has been ever since. I asked my doctor how that could be possible and he said there is a very small percentage of people who are immune to it and I am one of them. I won't test that theory though. I just know it's next to impossible for me to have not gotten it based on how many times I was exposed over the course of a few years.

I have green eyes. Only 2% of the population have green eyes.

I gave myself whiplash as a teenager from having a nightmare. I waited until I was vomiting & pooping blood to go to the ER, found out I had botulism & should have died. I had 2 periods a month for 20-odd years & no doctor could figure out why. Those are the biggest weird ones.

I have a simian crease in both hands. One is very pronounce, and one barely is. (I have one line straight across the palm, instead of one going up and one going down.) I have a form of spina bifida occulta. (The last vertebrae of my spine is fused to my pelvic bone, and it's at a slight angle, so I've had minor back pain/issues my whole life.) I was the last reported case of Smallpox in New Jersey. (I got it from the vaccine--I'm very pro-vaccine, though.) I'm dyslexic. (Dyslexia is a learning disability that comes in many forms and severities--for me it's mostly trouble spelling and poor memory, but I'm very successful and most people are surprised when they find out.)

when my siblings and I turned 10, we were IN a Disney parade.

I read a case study from Europe a few years ago about a patient who has a total immunity to opiates. Zero physiological response to many time the lethal dose. Not only did it not stop their pain, but they had no change in pulse or blood pressure in addition to other factors. The study concluded that approximately .2% of the world population has this trait. Most commonly, those of Nordic descent.

I was born with a rare congenital diaphragmatic hernia. It happens in .04% of the population a year (1 in 2,500).

I seem to be incapable of getting injured through exercise. I never do warming-ups or stretches, it feels best to just go full whack from zero. I can also just stop whatever exercise I do and just go home. Sore muscles are alien to me. I used to be a World level dancer in my 20s and had no injuries, despite training 20+ hours a week for 3 years. Now I am 47 and even though I have lost some strength and flexibility, and no longer compete, I can still dance as much as the young dancers.

I don't think what I have is all that lucky, but it is incredibly rare, I have a trigeminal schwannoma. They are benign brain tumors. Trigeminal schwannomas are rare accounting for 0.07–0.3% of all intracranial tumors and 0.8%–5% of intracranial schwannomas.

Due to not getting chicken pox as a child and not being immune, I am on the older end of the vaccinated population and will be a Guinea pig when it comes to whether vaccinated people are susceptible to shingles. My son has a birth defect in the growth plates in his legs that multiple specialists have never seen before.

I have anhidrosis. It's a disease were you don't sweat or just sweat in certain places. I have a rare form of anhidrosis were I don't have sweat glands

I have a natural immunity to smallpox and poison Ivy, ignored by mosquitoes, and the only time I’ve been ill in my entire life was when my roommate gave me covid-19.