Hello, I have problems with my knees. From times to times,(i have noticed that it is happening more often when it is colder outside) i feel inside contraction/clench in my knees which is lasting 2-5 min, and i also have round red spots on the edges of my knees. The symptoms are more intense on my right knee and i have a felling that i can move it with, let s say 90% of it s potential. I have the same feeling after I got out of the shower. Please let me know if it is something serious. What should I do? I am 25, female. Maya