Granulomatous mastitis is a rare inflammatory condition that affects the breast tissue. Other medical terms used to refer to this condition are idiopathic granulomatous mastitis (IGM), granulomatous lobular mastitis (GLM), and chronic relapsing lobular mastitis. Symptoms associated with granulomatous mastitis include pain, swelling, redness of the skin, and breast lumps. Patients may also experience fever, fatigue, and weight loss. Granulomatous mastitis can be difficult to diagnose due to its severity and similarity to other conditions such as breast cancer. Treatment options range from anti-inflammatory medications to surgical intervention, depending on the severity of the disease.