There are many other causes of EN but these are uncommon in New Zealand. Joint aches occur in over half of cases regardless of cause. The knee jonts are almost always affected, the other large joints less commonly. Joint symptoms may persist for months afterwards but always resolve completely. The EN lesions are ushered in by fever, general aching and feeling unwell.
Red lumps appear on the shins or about the knees and ankle.
They vary in size between a cherry and a grapefruit and in number from 2 to 50 or more. At these other sites the lesions are smaller and more superficial. Lesions continue to erupt for about 10 days. Aching of the legs and swelling of the ankles may persist for some weeks, especially if the patient does not rest up. New crops of EN may occur over a number of weeks.