Chronic and sporadic acute multi-joint pain, typically affecting 2-3 joints per flare, with flares lasting anywhere between hours to days. Pain can be very severe and affect mobility. Upon pain recession, the person will go back to "normal" and have no lasting damage to their joints.
Persons may also have other systems such as swelling, redness, soreness, stiffness, fatigue, etc. These vary from person to person as well as from more mild to severe instances of the condition.