Recent insights into neutrophilic dermatosis' pathophysiology have encouraged the use of targeted biological therapies for their treatment. Although systemic glucocorticoids remain the mainstay of treatment for Sweet's syndrome and pyoderma gangrenosum, anti-TNF-α is becoming the preferred treatment when pyoderma gangrenosum is accompanied by inflammatory bowel disease or rheumatoid arthritis. Interleukin-1 receptor inhibitor anakinra is a promising therapeutic alternative for refractory Sweet's syndrome.