Please do not panic! Lofgren's syndrome involves a constellation of features which may include fever, a skin condition called erythema nodosum and enlargement of some lymph nodes in the chest. It is usually due to a condition called sarcoidosis, even though a similar picture can occur with tuberculosis. Treatment depends on the underlying condition and may involve a short course of steroids. The outlook is generally not bad and recovery may take place in a few weeks.