Sore clicking knee for a week - I'm 20!

[asblackasyoursoul]

I'm around 110lbs and 5'1. I don't do a lot of exercise so no sport related injury. I

So around a week ago I just woke up with my left knee feeling a bit sore and stiff. Each day it just got worse and worse.
When I walk up stairs it is quite painful and my knee has been popping several times. Walking downstairs isn't so bad but still same symptoms. I'm also struggling to kneel down because it's very painful and it feels like my knee is being 'stretched'.

When my knee is bent and I raise it to be straight, it clicks. Every time.

Any ideas? I've never had pain with my knee before so I have no idea why it's started so suddenly!

I had this at the same age as you when I was also very slim - my GP said some people just have clicky joints ... having said that, I’ve gone on to develop arthritis on my kneecap so it would be worth going to see a physio and getting advice on exercises to stabilise your knee

Thanks for the reply! I’m just a bit worried because I’m young the doctor will just brush it off.
Still the same pain today. However now when I try to straighten it, it feels ‘locked’ and painful, and then I force it to straighten and get a big painful crack!