L-Arginine is a non necessary amino acid and is essential for regular performing of the pituitary gland. If you have serious symptoms, you can choose to have an appointment with a rheumatologist. This may lead to faster diagnosis and treatment. Lupus - an autoimmune condition that affects many different organs and body tissues. It does not increase testosterone directly but stimulates pituitary gland to produce more LH or Luteinizing Hormone, which in turn makes your testes produce more testosterone. It's great for enhancing your libido or sex drive. As a matter of fact, it can help you perform like a stud in bed! Rheumatologists have a special interest in unexplained rashes, fever, arthritis, anemia, weakness, weight loss, fatigue, joint or muscle pain, autoimmune diseases and anorexia. They often act as consultants, acting as medical detectives at the request of other doctors.