My Right Knee Didn't React To The Hammer Thump

@REO6205 If it's alright with you, I would really appreciate it if you could please leave this thread in the the Questions From New Drivers section for maybe several days until you move it to the Health section of the forum, that way I can get some eyeballs on this (the Health section of the forum isn't nearly as active as the Questions From New Drivers is). If you don't mind, of course.

So I recently got my Medical card renewed. The doctor did the thing where he thumps both your knees with a small hammer. Well, my right knee did not twitch at all, but my left knee twitched the first time he thumped it. He thumped my right knee probably a good 5-10 times in total (I didn't really count), and while I certainly could feel the hammer and while it wasn't pleasant, it wasn't really painful. Although it wasn't really painful in my left knee though either and my left knee still jumped/twitched when he thumped it. But my right knee just would not move or "jump" to the hammer thumping it.

I asked the doctor if my right knee was supposed to twitch/jump when he thumped it, and he said yes. I asked him if I should be worried about it and he said no because my left knee reacted and sometimes a certain knee won't react for whatever reason.

Well, I googled it and now I'm kind of worried. WebMD says it could be a sign of a health problem.

About Me:

Average height, average/healthy weight, younger side, blood pressure measured for my medical exam was 85 systolic and 60 disastolic (which doctor said was low but nothing to worry about) and my urinalysis was 1.005 (but I chugged a bottle water/16 oz diet coke right before because I forgot I had to pee for these tests and he was closing in half an hour so I had to make sure I peed before he closed).

I obviously know if I have any medical concerns I need to see an actual doctor, so please do not think I'm subsituting you guys for a doctor. But I still want to ask, has anybody ever not had one of their knees react when the doctor thumps it with the hammer?

How worried should I be about this as a younger man? Have any of you had your knee not react to the hammer one year when you got your medical exam done, but maybe 1 or 2 years after when you renewed your medical exam both knees reacted appropriately to the hammer thump?

Could this be caused by trucking somehow (I do OTR no touch freight, just for reference)?

 

I also wanted to add that I run 2 miles in about 20 minutes with no leg/knee pain and I drive an automatic truck. Just to add more context.