A low white blood cell (WBC) count is a decreased number of white blood cells (leukocytes) in the blood. A low WBC count is referred to medically as leukopenia.utoimmune diseases that attack your white blood cells can also lead to a low WBC count. Several different prescribed drugs, including chemotherapy, are known to decrease WBC production or destroy WBCs. A low WBC count can be serious because it increases your risk of developing a potentially life-threatening infection.
The most common cause of finger pain is a hand injury. Injuries to the finger can cause an open cut, a bruised or fractured bone, or muscle and tissue damage. Medical conditions that affect the nerves, muscles, or bones can also cause finger pain. For example, osteoarthritis causes the breakdown of cartilage, which is a tissue that cushions bones at joints. This breakdown causes bones to rub together and triggers pain and stiffness. In the hands, osteoarthritis can affect the joints at the base of the thumb, in the middle of the finger, and near the nail bed. A compressed or pinched nerve in the arm, wrist, or hand can also contribute to finger or thumb pain.
1 Arthritis, the breakdown of cartilage in the joint that causes inflammation with pain, stiffness, and swelling.  Carpal tunnel syndrome, pressure on the nerve in the wrist, or other nerve problems causing numbness and pain in the hand and fingers.