(uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature. (countable) A specific nitrogen within a chemical formula, or a specific isotope of nitrogen The two nitrogens are located next to one another on the ring.
An allergist specializes in allergies, asthma, and allergic asthma. Internist. An internist is a doctor who specializes in internal medicine -- the study of diseases in adults, particularly those related to internal organs -- and who has completed three years of training after medical school. Pediatrician.
Well, a rheumatologist is the doctor that often evaluates musculoskeletal medical conditions, and other diseases which can affect widespread muscles. A neurologist often evaluates and treats the same types of conditions. For pain issues, a physiatrist who specializes in pain management can be helpful with chronic muscle pain issues. Gastroparesis would be best evaluated by a gastroenterologist.