In all of the cases that I've seen it is usually subtractive, but most of the time it depends on how old the child is.
Yes because it gives the leg and ankle stability
Rhumetoid Arthritis: chronic arthritis. swollen and stiff joints, can be crippling, classified as an autoimmune disease.
Osteoarthritis: caused by joint degeneration (the destruction of cartilage) resulting in bone rubbing against bone.
I'm not sure which one of this it is, but the answer is a form of arthritis
This is only my opinion, but I think it is better to consume conventional medicines. Natural medicines don't guarantee a cure. Conventional medicines have been analyzed and researched to be produced with the right antibiotics for a given sickness. Bacteria in your body is continuously evolving to become resistant to antibiotics in your body. At some point, the medicine you put in your body will have no effect. By consuming natural medicines, once the bacteria in your body have become adapted to it, since there are a limited number of natural medicines, you can no longer take them. By consuming conventional medicines, scientists can continue to improvise and produce newer medicines that can cure us before the bacteria become resistant to them.