Aspirin is a pharmaceutical drug often used to treat pain, fever, and inflammation. A drug is any substance (other than food that provides nutritional support) that, when inhaled, injected, smoked, consumed, absorbed via a patch on the skin, or dissolved under the tongue causes a physiological change in the body.
In a crisis, the sympathetic division of your autonomic nervous system (ANS) mobilizes your body for action, directing your adrenal glands to release the stress hormone epinephrine (adrenaline) and norepinephrine (noradrenaline). To provide energy, your liver pours extra sugar into your bloodstream.
A sympathetic nerve block can be used to diagnose and/or treat pain disorders involving the sympathetic nervous system. The injection consists of a local anesthetic. The sympathetic nervous system is a network of nerves throughout your body. The nerves branch from your spine and control some body functions, such as the closing of blood vessels. A problem with these nerves can affect blood flow and cause symptoms in the hands or feet. They may hurt, burn, feel cold, or be tender to touch. The sympathetic nervous system is controlled by bunches of nerves called ganglions. One large ganglion, called the stellate ganglion, helps control nerves in the upper body.