You can cure arthritis on your own only if you have strong, rather very strong will power. Read further only if you are sure about it. Drink plenty of water. Practice yoga or do some gentle exercises. Change your diet. Follow Health = Nutrient/Calorie rule i.e. focus more on nutrients than calories intake. Check your Vitamin D. Prefer plant based diet than animal proteins. Our biological structure is suited more for plant based foods. Increase intake of fruits and vegetables. Avoid sugar, saturated fats (pizza, cheese, meat, dairy), trans fats (fast foods, fried foods), refined carbohydrates (white floor, white rice), sugar-free (Aspartame), alcohol. Maintain proper weight. Reduce the load on your knees. Fast once a week. Longer fasts may help more but experiment and find out what works best for you. Quit smoking (if you do). Avoid wearing high heels.