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).
Inflammation of the glands that produce the saliva in the mouth (salivary glands, including the parotid glands) leads to dry mouth. Sjogren's syndrome can consequently be complicated by infections of the eyes, breathing passages, and mouth.he diagnosis of Sjogren's syndrome can also be aided by a biopsy of affected tissue. The treatment of Sjogren's syndrome is directed toward the particular areas of the body that are involved by the disease and the complications such as infection.