Scaled patches of silver color. Quite often, psoriatic arthritis is a consequence of the prolonged development of psoriasis and inflammatory reactions in the cartilaginous and bony tissue of the joint surfaces in the patient’s body. In combination with plaque psoriasis, psoriatic arthritis can appear externally on the patient’s skin in the form of scaly spots of silvery color. Especially often such spots appear on the scalp, elbows and knee folds. There are many modern therapies that a well-qualified doctor can advise.