关节炎起病可急可缓，波及的关节可以是单个，也可以是对称性多关节，有时还可累及脊柱。病程在六周以内为急性；超过半年甚至可长达数年者为慢性。病变可波及关节外组织（肺、肝、脾、神经系统等），还可有发热、乏力等全身症状。 Arthritis onset can be slow, spread to the joints can be a single, can also be symmetric polyarticular, and sometimes can also affect the spine. Duration of acute within six weeks; more than six months or even up to several years of chronic. Lesions can affect the extra-articular tissues (lung, liver, spleen, nervous system, etc.), but also have fever, fatigue and other systemic symptoms.