Certain cancers can cause diarrhea, including: 1  Hormone-producing (neuroendocrine) tumors, including carcinoid syndrome and Zollinger-Ellison syndrome. 2  Colon cancer. 3  Lymphoma. Medullary carcinoma of the thyroid gland.  Pancreatic cancer.
Mildly low blood pressure, or hypotension, may be a sign of good health and a decreased risk of heart disease, but in some people, hypotension can be a problem. At times, continually low blood pressure or a sudden drop in blood pressure can lead to worrisome symptoms and even serious health problems. Understanding Hypotension. A blood pressure reading contains two numbers: systolic pressure and diastolic pressure. Systolic pressure is the top or first number in your blood pressure reading, indicating the pressure within your arteries when your heart pumps out blood.
Underlying causes of low blood pressure. Low blood pressure can occur with: Prolonged bed rest. Pregnancy. During the first 24 weeks of pregnancy, itâs common for blood pressure to drop. Decreases in blood volume. A decrease in blood volume can also cause blood pressure to drop. A significant loss of blood from major trauma, dehydration or severe internal bleeding reduces blood volume, leading to a severe drop in blood pressure.