If there's no obvious reason for a black stool (such as food, a supplement, or a medication like Pepto-bismol), it could be time to look for blood in the stool. 1  A variety of medical reasons can cause black stools that are also tarry with a foul smell.
1 Lungs, kidneys or liver. Inflammation may cause pneumonia, bronchitis or other problems in your lungs; may lead to problems with kidney function; and may cause hepatitis or cirrhosis in your liver.  Lymph nodes. A small percentage of people with Sjogren's syndrome develop cancer of the lymph nodes (lymphoma).
Alternative treatments or home remedies that have been listed in various sources as possibly beneficial for Sjogren's Syndrome may include: 1  Homeopathic eye drops. 2  Evening primrose oil. 3  Gamma-linolenic acid (GLA) 4  Vitamin C. 5  Vitamin B6. 6  more treatments Â».