Possible Causes and Treatments of Ammonia Smell in Nose: Excessive sweating is one of the main reasons for an ammonia smell in nose. Sweat in itself has no smell, but when it is exposed to bacteria on the skin, it can develop a foul odor. This is mostly due to bacterial digestion of apocrine sweat. When someone smells imaginary odors (phantom smells), this is termed phantosmia or olfactory hallucination. Phantosmia patients perceive smells in a unique, usually unpleasant way, which can ruin the taste of food and drink. Phantosmia can occur in one or both nostrils, and usually disappears over time, so it s nothing to worry about. However, if you’re concerned, and the phantosmia has gone on for a while, see a medical professional. Parosmia, also known as troposmia, is the dysregulation of the sense of smell, so the brain cannot determine natural odors. Many substances will seem as though they have a burning, fecal, rotten, chemical or ammonia smell in nose. Some patients will instead perceive normal smells to have a particularly pleasant odor; this is termed euosmia. Parosmia can be a result of temporal lobe epilepsy, Parkinson’s disease, head trauma, and infections of the upper respiratory tract. When the tissue lining the sinuses becomes swollen and inflamed, this is called sinusitis. The sinuses cavities behind your nose and mouth, usually filled with air, become infected with bacteria, fungi, or viruses, and blocked with fluid. Sinusitis can occur due to a common cold, nasal polyps (small protrusions in the nasal lining), allergic rhinitis (a swollen nasal lining), or a deviated septum (where the nasal cavity has become shifted). The two kidneys are situated immediately above the waist at the rear abdominal region on either side of the spine. They eliminate surplus liquid and waste products from the blood, allowing the salt and mineral levels in the blood to remain constant, and they are involved in the regulation of blood pressure.