i am reading this because after oil pulling for a few months i coughed up phlegm with tiny black dots, now i have coughed up phlegm with grass green tiny specs...
For Arthritis read "pain free in six weeks" by sherry rogers.
look into ACV, do saunas at the gym, and do weight and balance exercises for the legs.
I had some joint pain that went away with detoxing and had a bad knee which i now jump and dance on. I did this by weight training and taking glucosamine and condroition and eating lots of super foods and NO Processed foods or commercial meat or dairy.