Why Do Occipital Headaches Cause Pain Behind the Eyes

This article explains how nerve irritation at the base of the skull causes pain behind the eyes. It details how the occipital and trigeminal nerves converge in the brainstem causing the brain to misinterpret neck pain as retro orbital pain.

Of course the first thing that comes to mind when you experience sharp pain and discomfort behind your eyes is some kind of problem with the eye's sinuses or tension headache. But the main cause of this problem is usually located much farther away from the eyes i.e. at the base of the skull. An occipital headache is so powerful that the pain is referred to the retro orbital area i.e. right behind the eye socket making it difficult to pinpoint the source of the pain. Thus it may be difficult to understand how a problem at the back of the neck could be the origin of the pain between the eyes but in order to understand this it is important to study some neurological aspects of the problem and refer to pain.

The Anatomy Behind the Pain: Nerves of the Head and Neck

To understand how pain travels from the back of the head to the front it helps to look at two primary nerve systems: the occipital nerves and the trigeminal nerve.

1. The Occipital Nerves

The occipital nerves emerge from between the vertebrae of the upper cervical spine, specifically the second and third cervical nerves (C2C_2C2​ and C3C_3C3​). These nerves weave through the dense muscles of the neck and scalp traveling upward from the base of the skull toward the top of the head. They are primarily responsible for providing sensation to the back and top of the scalp. When these nerves become inflamed, compressed or irritated they send sharp or aching pain signals along their path.

2. The Trigeminal Nerve

The trigeminal nerve (CN VCN\ VCN V) is the largest cranial nerve and provides sensory coverage for the face, forehead and eyes. It splits into three major branches:

• Ophthalmic Branch (V1V_1V1​): Supplies sensation to the forehead upper scalp upper eyelids and the deep structures within and behind the eye socket
  
  
• Maxillary Branch (V2V_2V2​): Covers the middle face cheek and upper jaw
• Mandibular Branch (V3V_3V3​): Controls the lower jaw and chin area

The ophthalmic branch (V1V_1V1​) is the specific pathway responsible for registering pain deep behind the eyes.

The Neurological Link: The Trigeminocervical Nucleus

Retro-orbital pain caused by nerve irritation at the base of the skull is explained by what happens inside the brainstem at a junction referred to as the Trigeminocervical Nucleus (TCN).

The TCN is one of the chief central processing stations for the incoming signals from the nape of the neck and the face. The sensory nerves from the upper cervical spinal nerves (C1C_1C1​ C2C_2C2​ and C3C_3C3​) and the sensory nerves from the trigeminal nerve sensory branch (V1V_1V1​) enter the brainstem at that level and meet at the same pool of secondary neurons. 

Because they share the same relay the nerve pathways from different parts of the body cause central sensory convergence. When signals of severe pain resulting from irritations of the occipital nerve invade the TCN the brain has difficulty locating the source of the signals. This results in the inability of the CNS to interpret the signals properly and the pain is associated with both the back of the head and the trigeminal nerve pathway.

Common Triggers for Occipital Nerve Irritation

Several daily factors and structural issues can compress or irritate the occipital nerves setting off the convergence cascade in the TCN:

• Forward head posture or Tech Neck: Hours spent looking down at screens or sitting at a desk pull the head forward, placing immense strain on the suboccipital muscles. Furthermore how you position your head while sleeping can place continuous night-long pressure on the cervical spinal nerves, causing tight suboccipital muscles to clamp down on the occipital pathways.
• Degeneration of the cervical spine: Certain conditions like osteoarthritis intracervical disc herniation or the formation of bone spurs in the upper neck may put pressure or inflame C2 and C3 nerve roots
• Injuries and whiplash: The abrupt motion or force from road accidents or sports injuries can create micro injuries to the ligaments and muscles surrounding the occipital nerves
• Muscle tension and stress: The high intensity of physical or emotional stress will lead to the involuntary contraction of neck and shoulder muscles limiting blood flow and irritating surrounding neural tissues

Differentiating Occipital Nerve Pain from Other Headaches

Because pain behind the eye is a shared symptom across several headache types recognizing distinct patterns is essential for proper management:

• Occipital Neuralgia Vs. Migraine: In case of occipital neuralgia a person usually complains of severe shooting and throbbing pain originating in the neck area. Migraines on the other hand are usually accompanied by various systemic symptoms such as nausea visual aura and hypersensitivity to light and sound in addition to retroorbital pain
• Occipital Pain Vs. Sinus Headaches: Sinus headaches usually happen with facial pressure around the area of the forehead and cheeks. The symptoms of sinus headaches often accompany nasal congestion or fever. On the contrary occipital nerve pain usually manifests with tenderness in the neck area and hypersensitivity of the scalp
• Occipital Pain Vs. Tension Headaches: The defining characteristic of tension headache is the mild pressure in the area of the forehead. The pain caused by irritation of occipital nerve has a distinctive way and originates in the back of the neck

Relief and Management Options

Addressing pain behind the eyes caused by occipital irritation requires targeting the source in the neck:

• Posture and ergonomics correction: Screen position should be aligned eye level taking regular breaks and prevent to have pain in sub occipital muscles
• Physiotherapy: Stretching of neck muscles and strengthening of cervical flexors will decrease the strain on the nerve root
• Hot and cold therapy: Of the neck can help relax the tension and cold packs can be useful in decreasing the swelling of the nerves
• Medical treatment: Your doctor may recommend muscle relaxant anti-inflammatory medications or occipital nerve block if your case is severe

Conclusion

Any type of pain experienced behind the eyes does not mean that the eyes or sinuses are in trouble. The Referred pain at the neck at the base of the skull might through the 3rd dimensional environment of the Trigeminocervical Nucleus induce the feeling of pain at the areas of the eyes.

Disclaimer

This site is for information only and is not medical advice. If you need help with a diagnosis or treatment please seek advice from your physician. For chronic headaches consult the specialists of the Migraine Surgery Specialty Center for expert personal assessment.