What are common causes of Headache ?

A pain that occurs just above the eyes or/and ears, or just behind the head or at the upper portion of the neck is generally termed as headache or cephalagia in medical terms. This is one of the most common ailments that we come across in our day to day lives. The causes of headache are manifold. Though the most common cause is migraine, there are other factors that contribute to this painful experience. 


These include
• Stress
• Viral or bacterial infections
• Sensitivity to certain kinds of food
• Straining of the eyes
• Exhaustion
• An injury in the head or neck
• Poisoning due to excessive exposure to carbon mono oxide.
• Diseases like encephalitis, meningitis
• Brain tumors
• Sinusitis 
• Caffeine withdrawal

 


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Initial Headaches can be broadly categorized into two kinds – primary and secondary. The headaches which do not have their roots in infections and diseases form the first category. For instance head pain caused due to migraine or tensions are primary headaches. Secondary headaches are those which are caused due to certain infections. Such kinds of headaches are serious and should be treated immediately. For the normal headache, medicines like aspirin, paracetamol or ibuprofen, available over-the-counter provides relief; but for migraine or other infection related headaches medical attention should be sought at the earliest.

Primary headaches
Migraine
Head pain caused by migraine attacks are the most common of the primary headache. Almost 12% of the population of the United States suffers from migraine headaches. This can affect anybody – from young children to the old. However, research has shown that though before the attainment of puberty it affects both men and women equally, in adulthood more women are affected by this than men; about 6% of men suffer from migraine attacks in comparison to 18% of the women population.

 

There are various factors that can trigger a migraine attack
• Environment – pollution, smoke, glaring lights, excessive or inadequate sleeping patterns, weather changes, inadequate food intake, very strong smells.
• Hormonal changes – factors like pregnancy, oral contraceptives, HRT or hormone replacement therapy and menstruation also cause attacks.
• Food – alcohol, caffeine, chocolate, monosodium glutamate, artificial sweeteners, certain fruits, sugar, few types of vegetables and even yeast can cause migraine pains.
• Inadequate exercising and excessive exhaustion are also responsible.

Tension
Besides migraine, tension headaches are the next most common causes of headache. It has been seen that almost 90% of adults suffer from muscle contraction headache or acute tension type headache. Like migraine, this is also more common in women than men. The exact causes for this headache are still unknown but it is assumed that extreme tensions as well as stress are the dominating factors. Tension headaches are generally mild and happen on both sides of the head. 

Secondary headaches
Chronic headache
Chronic headache is caused due to some injuries in the head and neck (for e.g. whiplash injury) and hence need to be treated with great care. Excessive stress can exacerbate this situation. While treating the patients with chronic headache, doctors first attempt to bring back the person to the initial acute headache pattern.

Cluster headache
Cluster headaches are extremely rare situations and affect 1 in 10men and 1 in 6000 women. This is an awfully painful situation which is typified by sporadic headaches common in youngsters who are smokers. The symptoms of cluster headache make it unique. It typically appears in bouts (clusters) for about 6 to 12 weeks either once a year or once in every two years at the same time of the year. The person suffers from excruciating unilateral pain in the area around the eye which happens once or even six to seven times a day. This pain usually occurs during night. During this time, the eyes become red and watery with blocked or at time running nose. This is accompanied by ptosis (or droopy eyelids). If the situation is untreated for long, it goes into chronic phase which is very dangerous.

 

Sinister headaches
A person suffering from sinister headache should seek medical attention immediately. A few of the prominent causes of sinister include:
• Meningitis – this is generally accompanied by fever and a stiff neck.
• Brain tumors – very big tumors in the brain are also responsible for this headache. This is pretty rare occurrence and is usually hereditary. 
• Carbon monoxide poisoning – though rare, this can also cause headaches which can be fatal. The accompaniments are nausea, vomiting, giddiness, muscular weakness, blurred vision.
• Subarachnoid hemorrhage – this type has an ictal or abrupt commencement of headache and has no warning signals. This is often described as the worst of the headaches.
• Temporal arteritis – this is a continuous pain that at times becomes severe especially at night for patients aged 50 and above. It is accompanied by the tenderness of the scalp.

 

Besides primary and secondary, headaches can be further divided into four kinds
• Vascular
• Myogenic
• Traction
• Inflammatory

Vascular
Migraine is the most common type of vascular headache that is characterized by unilateral or bilateral, pulsating pain with an upset stomach and blurred vision. Migraine usually affects more women than men.
Toxic headache or the pain that succeeds fever (due to viral infection or cold) is another form of vascular headache.
Cluster headaches (as discussed above) are also a type of vascular headache.

Myogenic
This is also known as muscular headaches and is characterized by stiffening of the neck and facial muscles. Tension headaches form the most common type of myogenic headache.

Traction & Inflammatory
These types of headaches are caused by other physical ailments like stroke or sinus.
Listed below are some well known headaches!
• Ice cream headache
• Drug overuse headache
• Thunderclap headache
• Ictal headache
• Sex headache or coital cephalgia
• Toxic headache
It must be noted that headaches are just not ailments; they are rather symptoms of some serious disorders and should never be ignored.

Pathophysiology
The brain does not have the pain sensitive nerves and hence is not sensitive towards it. Pain can afflict different regions on the head which includes the web of nervesthat is spread all over the scalp, the face, mouth area and throst. The meninges along with the blood vessels are sensitive towards the pain and an irritation of these meninges and blood vessels results in headaches.

 

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Article Contributed By: Sukanya Banerjee

 

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