Discover the causes of severe headaches at the back of the head, the different types and causes of headaches, and how to tell a normal headache apart from high blood pressure headaches — plus the best treatments and prevention tips.

Headaches are one of the most universal human experiences. Nearly everyone will experience having a headache at some point in their lives; however, for most people, it occurs without much consequence. Still, headaches vary enormously in cause, severity, and what they mean for a person’s health, and understanding those differences can help you know when a headache is harmless and when it deserves closer medical attention.

What Is a Headache?

A headache is pain or discomfort felt in the head or face. It’s often described as throbbing, constant, sharp, or dull, and it can vary widely in location, intensity, and how long it lasts. Interestingly, the brain tissue itself doesn’t contain pain-sensitive nerve fibers and cannot feel pain directly. The pain of a headache instead comes from a network of structures surrounding the brain, including the nerves of the scalp, face, mouth, and throat, the muscles of the head and neck, and the blood vessels along the brain’s surface. When these structures are irritated or activated, they send pain signals that the brain interprets as a headache.

Headaches are extremely common. Globally, headache disorders affect close to 40% of the population, making them one of the most common conditions of the nervous system.

What Are the Types of Headaches?

There are more than 150 recognized types of headaches, but they fall into two broad categories: primary and secondary.

Primary headaches occur on their own and are not caused by another underlying medical condition. They result from overactivity or dysfunction of pain-sensitive structures in the head. The main types include:

• Tension-type headaches: the most common form, often described as a tight band or pressure around the head.
• Migraine: a neurological condition involving throbbing pain along with other symptoms such as nausea and light sensitivity.
• Cluster headaches: severe, one-sided headaches that occur in repeated episodes, or clusters, often around one eye.
• New daily persistent headaches: a rarer form that begins suddenly and continues daily.

Primary headaches are frequently triggered by everyday factors, including alcohol, certain foods, changes in sleep, poor posture, skipped meals, physical exertion, or hormonal changes.

Secondary headaches occur as a symptom of an underlying medical condition. Some types, such as dehydration headaches, sinus headaches, and medication-overuse headaches, are uncomfortable but generally resolve once the underlying cause is treated. Others can signal something more serious, such as a head injury, a sudden rise in blood pressure, or bleeding around the brain, and require prompt medical evaluation.

What’s the Difference between Headache and Migraine?

Migraine is one specific type of primary headache disorder that sits within the broader category of headaches.

Aspect	Headache (General Term)	Migraine
Definition	A broad term for pain anywhere in the head or face	A specific primary headache disorder involving the nervous system
Relationship	An umbrella category that includes over 150 specific types	One type of primary headache within that broader category
Typical pain location	Varies widely by type; can affect the whole head, one side, or a band-like area	Often one-sided, and commonly behind or around one eye
Duration	Ranges from minutes to several days, depending on the type	Typically lasts 4 to 72 hours per episode
Associated symptoms	Varies by type	Frequently accompanied by nausea, vomiting, and sensitivity to light and sound; sometimes preceded by an “aura” of visual or sensory changes
Effect of physical activity	Not always affected by movement	Often worsens with routine physical activity

What Are the Symptoms and Signs of a Headache?

Symptoms depend heavily on the type of headache involved. General headache symptoms often include:

• Gradual onset of pain
• Pain affecting both sides of the head
• A dull ache or a sensation of pressure, tightness, or a band around the head
• Mild to moderate intensity

Migraine and cluster headaches, by contrast, tend to bring more distinct additional symptoms, such as intense one-sided pain, nausea, visual disturbances, watering or redness of the eye, or sensitivity to light and sound.

Certain symptoms require urgent medical attention rather than routine care. These include a sudden and severe headache unlike any before, a headache accompanied by fever, stiff neck, confusion, or a rash, a headache following a head injury, or one that develops alongside weakness, numbness, difficulty speaking, vision changes, or loss of balance.

How Are Headaches Diagnosed?

Diagnosing a headache generally begins with a detailed conversation about your symptoms and medical history, followed by a physical and neurological examination. Your healthcare provider will typically ask about when the headaches occur, what they feel like, how long they last, how severe the pain is, and what factors seem to trigger or relieve them. Family history is also relevant, since headache disorders, particularly migraine, tend to run in families.

For most primary headaches, such as tension-type headaches, migraine, and cluster headaches, this history and examination are usually sufficient to reach a diagnosis, and imaging tests are not typically needed. However, if a provider suspects a secondary headache caused by an underlying condition, further testing may be recommended, which can include blood tests, sinus imaging, a CT scan, or an MRI to rule out structural or neurological causes.

How Are Headaches Treated?

Treatment depends on the specific type of headache and its underlying cause. One of the most important steps in managing primary headaches is identifying personal triggers, often with the help of a headache diary that tracks symptoms, food and drink intake, sleep, and stress levels.

Common approaches to management include:

• Lifestyle and self-care measures, such as resting in a quiet, dark room, staying hydrated, maintaining regular sleep and meal schedules, and applying heat or cold packs.
• Stress management techniques, including relaxation exercises, deep breathing, and, in some cases, biofeedback, which teaches patients to recognize and control physical responses to stress.
• Over-the-counter pain relievers, which are generally effective for occasional, mild headaches, though frequent use can paradoxically lead to medication-overuse headaches.
• Prescription medications, for more frequent or severe headaches. These may include drugs that stop a migraine attack once it begins, as well as preventive medications taken regularly to reduce how often headaches occur.
• Treating the underlying condition, in the case of secondary headaches, which resolves the headache once the root cause is addressed.

Most headache disorders don’t yet have a definitive cure, but with the right combination of treatments, symptoms can generally be well controlled and their frequency significantly reduced.

Can Headaches Be Prevented, and How?

For many people, headaches can be meaningfully reduced, and sometimes prevented altogether, by identifying and managing personal triggers. Since triggers vary widely from person to person, this often requires some trial and observation, again aided by a headache diary.

Helpful preventive strategies commonly include:

• Maintaining regular, adequate sleep
• Eating meals on a consistent schedule and avoiding skipped meals
• Staying well hydrated
• Limiting alcohol intake
• Managing stress through relaxation techniques or counseling
• Practicing good posture, particularly for those who spend long hours at a desk or screen
• Avoiding known personal triggers, such as certain foods, strong odors, or specific environmental exposures

For those with frequent migraine or cluster headaches, healthcare providers may also recommend daily preventive medication to reduce how often attacks occur. When triggers cannot be identified or avoided on your own, a doctor can help develop a more personalized prevention plan.

When to See a Doctor

Occasional, mild headaches are usually nothing to worry about and often respond well to rest and over-the-counter treatment. However, it’s advisable to consult a healthcare provider if you experience headaches more than once a week, if your headaches are worsening or not improving, if you find yourself needing pain relievers nearly every day, or if a headache is accompanied by any of the warning symptoms described above. Keeping track of your headache patterns can make a significant difference in helping your provider reach an accurate diagnosis and an effective treatment plan.

Headache at the Base of the Head: An Overview

A headache at the base of the head — the area where the skull meets the neck — is one of the most common complaints people experience, and in most cases, it isn’t a cause for serious concern. This type of pain often stems from muscle tension in the neck and shoulders, poor posture (especially from prolonged sitting or screen use), stress, dehydration, or lack of sleep. It can range from a mild, dull ache to a more persistent, throbbing sensation, and is sometimes accompanied by stiffness in the neck or a feeling of pressure that spreads toward the temples or forehead. While the majority of these headaches are linked to everyday lifestyle factors and can be managed with rest, hydration, and simple lifestyle adjustments, some cases may be connected to underlying issues such as high blood pressure, cervical spine problems, or nerve irritation in the back of the skull. Because the causes vary so widely, paying attention to how often the headache occurs, its intensity, and any accompanying symptoms can help determine whether it’s a temporary, harmless episode or something that warrants medical evaluation.

Because the causes vary so widely, paying attention to how often the headache occurs, its intensity, whether it worsens over time, and any accompanying symptoms — such as dizziness, blurred vision, or numbness — can help determine whether it’s a temporary, harmless episode or something that warrants medical evaluation. Keeping a simple record of when the headache occurs and what seems to trigger it can also make it easier for a doctor to identify the root cause if the problem persists.

In the end, a headache at the base of the head remains one of the most common symptoms most people experience at some point, and it’s often linked to simple, manageable causes such as lack of sleep, dehydration, poor posture, and stress. That said, staying attentive to the nature of the pain, how often it occurs, and any accompanying symptoms remains essential, as some cases may point to an underlying health issue that requires medical attention, such as high blood pressure or cervical spine problems. Ultimately, listening to your body’s signals and acting early when needed is the best way to manage headaches effectively and protect your long-term health.