5 Important Causes of Pain on the Left Side of the Head

What causes pain on the left side of the head? Is pain in the left back of the head serious? When to see a doctor for pain on the left side of the head? Is it normal for pain to the left of the head to hit the eye? You can find the answers to all these questions and much more below.

What does it mean to have pain on the left side of the head?

Various types of headaches, including migraines and cluster headaches, can cause pain on the left side of the head . Some of the causes of pain in the left side of the head can be cured with home treatment, while other causes may require medical treatment. Also, doctors often classify headaches as “primary” or “secondary,” including unilateral headaches . For a person with a primary headache, pain is the main symptom. For a person with a secondary headache, the pain is a symptom of another medical problem.

What causes pain on the left side of the head?

1. Migraine headaches

Migraines can trigger pain on the left side of the head. Migraine headaches can be throbbing and worse on one side. Sometimes it causes pain on the left side of the head and complaints of hitting the eyes , and sometimes it can cause pain on the right side of the head . The pain may start around the eye or temple, then you may feel pain on the left side of the head .

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Other possible symptoms of migraine include:

  • Changes in vision
  • Nausea and vomiting
  • dizziness
  • Hypersensitivity to sound, light, touch or smell
  • Numbness or tingling sensation in the face or extremities

Experts do not know exactly what causes migraine. However, they speculate that genetic factors and environmental triggers may play a role in migraine headaches. Migraine triggers are thought to include stress, hormonal changes, alcohol, sleep problems, certain lights, and certain smells.

2. Cluster headaches

Cluster headaches can cause pain, especially around the eyes and on the left side of the head, and left-sided headaches can also affect the eye. The pain can be very severe and feel sharp, burning, or stabbing. When cluster headaches do occur, the headaches tend to occur several times within 4-12 weeks, then stop, possibly for several years. Cluster headaches usually affect the same side each time.

Prominent features of cluster headaches include:

  • Pain behind one eye, temple, or one side of the forehead
  • Pain that starts at night, usually 1-2 hours after falling asleep
  • Pain that peaks 5-10 minutes after onset
  • Severe pain lasting 30-60 minutes after onset
  • Pain that subsides after 60 minutes

Symptoms of cluster headaches include:

  • Nasal congestion or runny nose
  • Headache striking
  • drooping eyelid
  • One eye watering and redness
  • facial flushing or sweating

Cluster headaches tend to occur at the same time each day. It may also be more common in the spring or fall seasons, and people may confuse them with allergy headaches. Cluster headaches usually affect people between the ages of 20 and 50, and the vast majority of those affected are men.

3. Cervicogenic headaches

Cervicogenic headaches can be caused by a neck injury, such as a neck injury, arthritis, or other changes in the vertebrae at the top of the spine, and can cause pain on the left side of the head. In some cases, the pain felt on the left side of the head may appear as pain behind the ear . This type of headache can cause problems such as:

  • Moderate to severe pain that begins in the neck and radiates from one side of the head to the eyes and face
  • Neck stiffness or decreased range of motion in the neck
  • Pain around the eyes, neck, shoulder and arm
  • Nausea
  • blurred vision
  • Sensitivity to light and sound
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Steroid injections such as ibuprofen and nonsteroidal anti-inflammatory drugs can help manage pain. With treatment, cervicogenic headaches usually resolve within 3 months, although they can occur later. Pain and other symptoms can be cyclical and flare up periodically, although the frequency varies from person to person.

4. Vasculitis

An autoimmune attack , in which the body’s immune system reacts as if the blood vessels were harmful substances, can lead to vasculitis, a type of blood vessel inflammation. A common type of vasculitis is giant cell arteritis, also called temporal arteritis . This affects the blood vessels in the head and usually occurs in people over the age of 50. Vasculitis can cause severe headaches with no apparent reason for it. Severe headache peaks in 1 minute and lasts at least five minutes.

Other symptoms of vasculitis include:

  • sudden vision loss
  • pain behind the eye
  • pain on the left side of the head
  • Pain when chewing something


Anyone experiencing the above symptoms should seek medical attention. Because not treating vasculitis can cause permanent vision loss.

5. Brain aneurysm

A brain aneurysm is a weak spot in a blood vessel in the brain. Because the symptoms of a brain aneurysm come on late, it is often noticed late and can result in life-threatening bleeding. A person with a brain aneurysm may develop a severe, thunderous headache. A brain aneurysm can sometimes be felt as pain in the left back of the head . They may feel like they’ve been hit hard on the head, and they may also have weakness on one side of the body.

Other symptoms of a brain aneurysm include:

  • vision changes
  • pain or stiffness in the neck
  • Nausea and vomiting
  • light sensitivity
  • clouding of consciousness
  • Loss of consciousness
  • seizures
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When should you see a doctor?

If a person is experiencing a left-sided headache and has other symptoms along with the pain, they should definitely be examined. It is important for the affected person to see a doctor if the following symptoms occur along with pain on the left side of the head :

  • blurry vision
  • High fever
  • Exude
  • Nausea and vomiting
  • weakness on one side of the body

It is also important for the affected person to consult a doctor if:

  • If headaches occur after age 50
  • If there is a significant change in the headache pattern
  • If the headaches are getting worse
  • If the affected person has changes in mental function or personality
  • If the headache arose after a blow to the head
  • Headaches make it difficult to manage daily life


Anyone with a severe, sudden headache should seek emergency care, as this could be a sign of a stroke or aneurysm.

How does the pain go on the left side of the head?

Many people can treat and rest their headaches with over-the-counter medications. Where possible, the following measures can also help prevent some types of headaches:

  • avoiding or managing stress
  • Paying attention to sleep patterns
  • Getting enough sleep (7-9 hours a day)
  • avoiding headache triggers

If you see a doctor for a headache that doesn’t go away, he or she may also prescribe stronger pain medications for the pain.

As a result

Pain on the left side of the head; It can be caused by migraine, vasculitis, cluster headaches, or other types of headaches. Often times, the affected person can treat and relieve their headache with over-the-counter medications. However, if the headaches are severe, persistent, or otherwise bothersome, a doctor’s check-up is essential. Anyone with a sudden, severe headache and weakness or confusion on one side of the body should seek medical attention.

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