Hi, I am 57 years old and I have Osgood Slaters disease, I now have arthiritis in both knees AND now I need surgery because I have torn cartlidge in the knee....I know exactly what you are talking about the pain when it rains and snows, my knees swell up especially my right knee. and when it gets really bad I have a very hard time putting pressure to walk.....I have had this since I was 10 years old.....just wanted to share this with someone who can relate.....Take care! LLM I am female.....