求翻译：关节型：关节部位血管受累出现关节肿胀、疼痛、压痛及功能障碍等表现（约1/2患者有关节症状），多发生于膝、踝、腕、肘等大关节，关节肿胀一般较轻，呈游走性，反复发作，经数日而愈，不留后遗症。是什么意思？

Joint type: Vascular involvement appear swollen joints, joint pain, tenderness and dysfunction, (about one-second in patients with joint symptoms), occurs in the knee, ankle, wrist, elbow joint, swelling generally lighter, is wandering, recurrent attacks, after several days, leaving no sequela.