Fludrocortisone and Midodrine are both medications that can help raise blood pressure. Ask your physician if one of these medications would be right for your situation. People are not generally prescribed medicine for low blood pressure, as it's not often a cause for concern unless it presents with symptoms.
Why do the middle fingers lock up when experiencing pain in neck and shoulders?   One cause could be some kind of impingement (pressure or swelling that applies pressure) of the spinal cord at C7, one of the cervical segments of your spine.
Trigger Finger. Trigger finger, also known as stenosing tenosynovitis, is a condition in which one of your fingers gets stuck in a bent position. Trigger finger occurs when inflammation narrows the space within the sheath that surrounds the tendon in the affected finger.