A child with arthritis may have an obviously swollen joint, or he/she is stiff when waking up and might walk with a limp, or may have trouble using an arm or leg. Children do not always complain of pain because they may adjust the way they do things so that it hurts less, or they may simply ask to be carried more often. With some of the more serious types of JIA, children may also have a fever, a rash, or feel very weak and fatigued.