Sores in the nose can be a sign of herbal overdose as well as several forms of poisoning. Both gingko biloba and ginseng are often taken as herbal supplements to improve general health and mental acuity. Over a period of years, if either is taken in dosages of more than three grams a day, it can cause sores in the mucous membranes, most notably in the nose, as well as diarrhea, rapid heartbeat and joint swelling. Heavy metal poisoning (lead or cobalt, for example) can have a similar effect. Finally, though it’s not a likely occurrence, the spines of many different poisonous caterpillars can produce bloody sores around the mucous membranes if ingested.
Allergic reactions to various prescription drugs can cause red, rash-like sores around and inside the nose and mouth. Ethylenediamine dihydrochloride is a mix which is often found in nasal spray and skin creams. It’s a common allergy which produces flaking sores wherever it touches. Corticosteroids are prescribed for the outbreak and the source of the allergy should then be avoided.
There are many different blood diseases which cause sores in the nose--some minor, others very dangerous. Benign mucosa pemphigoid is a chronic disease characterized by scarring around the mouth, nose, and eyes. Among the anesthesia, deformities, and decay of the limbs created by leprosy, sore in the nose are not uncommon. Leukemia, being a cancer of the blood cells, leaves sores across the skin and mucous membranes. Lymphomatoid granulomatosis is a disease where the blood vessels of the body are progressively destroyed. Those around the mouth, in the nose and surrounding the eyes are often the first to be affected.