What Causes Numbness on the Left Side?

Numbness on the left side of the body can be a very troubling symptom. There are several medical conditions that can cause this symptom, from something as potentially life-threatening such as a stroke to simply staying in one position for too long. Migraine headaches, seizures, or diabetes may also lead to numbness. A medical condition known as multiple sclerosis is a relatively common cause of losing feeling on the left side of the body.

Sitting, standing, or lying in one position for prolonged periods of time can sometimes cause numbness on one side of the body. Those who have a limited ability to move or who work in vocations that require staying in one position for long periods of time are the most likely to present with this symptom. When possible, a person should try to change positions frequently to avoid the numbness. Those with physical limitations should find a caregiver who can help with frequent changes of position.

Problems in the brain, including a stroke or tumor, can also cause numbness. A stroke may occur when there is a disruption to the blood flow in the brain; strokes most commonly cause numbness on the right side of the body, but can sometimes cause problems on the left as well. Immediate medical attention is required when a stroke is suspected, as permanent brain damage is possible. A brain tumor in the right hemisphere of the brain can also cause a slow loss of sensation on the left side of the body.

Migraine headaches or seizures may lead to a temporary numbness on the left side of the body. This symptom typically goes away once the originating cause has been successfully treated. Prescription medications may be used if the migraines or seizures become a recurrent problem.

Diabetes is a medical condition that may cause damage to the nerves of the body. This nerve damage may sometimes lead to numbness on the left side of the body. This symptom may lessen or go away completely when blood sugar levels are managed properly. Many patients require a combination of dietary changes and prescription medications to effectively control diabetes.

Multiple sclerosis is a chronic medical condition in which the protective covering over the nerves becomes damaged. When this occurs, numbness on the left side of the body is possible. While there is no cure for this condition, prescription medications may help to ease this as well as other symptoms. In some forms of multiple sclerosis, this numbness may come and go. Unfortunately, this does become a permanent symptom in some patients. Any questions or concerns about body numbness should always be addressed with a medical professional.