o In about 40%of cases the cutaneous manifestations are preceded by mild fever, headache,joint symptoms,and abdominal pain for up to 2 weeks.Arthralgia progressing to arthritis produces periarticular swelling around the knees and ankles.⚫ In about 40% of cases the cutaneous manifestations are preceded by mild fever, headache, joint symptoms, and abdominal pain for up to 2 weeks. Arthralgia progressing to arthritis produces periarticular swelling around the knees and ankles