Overview
Headache is one of the most common symptoms people experience. It can happen on its own or along with other symptoms such as nausea, fever, sensitivity to light, or neck discomfort. Headaches vary in severity, frequency, and cause. While many are temporary and manageable, some need prompt medical assessment.
Key Symptoms
Headache pain may affect one side or both sides of the head, the forehead, around the eyes, the face, or the back of the head and neck. The pain may be throbbing, pressing, stabbing, or band-like, and it may be mild to severe. Some people also have nausea, vomiting, visual changes, dizziness, sound sensitivity, or light sensitivity. Fever, weakness, confusion, speech trouble, or fainting are warning signs that need urgent care.
Causes and Risk Factors
Headaches can happen for many reasons. Common causes include viral illnesses, stress, lack of sleep, dehydration, eye strain, muscle tension, skipped meals, caffeine changes, and alcohol use. Some headaches are due to primary headache disorders such as migraine, tension-type headache, or cluster headache. Less common but serious causes include head injury, severe infection, bleeding around the brain, very high blood pressure, or other neurological problems.
Who Is Affected
Headaches can affect people of any age, including children and older adults. Some types, such as migraine, may be more common in certain age groups and can run in families. People under high stress, those with irregular sleep, and those with frequent illness triggers may notice headaches more often. New headaches in older age deserve medical attention because they may have different causes.
Prevention
Some headaches can be reduced by keeping regular sleep, meals, hydration, and stress management habits. Limiting known personal triggers, taking breaks from screens, and treating underlying vision or health problems may also help. If headaches happen often, keeping a symptom diary can help identify patterns such as certain foods, menstrual cycles, travel, or sleep disruption. Prevention depends on the cause, so repeated or disabling headaches should be discussed with a healthcare professional.
Diagnosis and Tests
Diagnosis usually starts with questions about where the pain is, how it feels, how long it lasts, what triggers it, and what other symptoms happen at the same time. A healthcare professional may ask about medications, injuries, medical conditions, and family history, and may do a physical and neurological exam. Tests are not needed for every headache, but blood tests, imaging, or other studies may be used if there are red flags such as sudden onset, neurological symptoms, fever, trauma, or a major change from usual headaches.
Treatment Categories
Treatment depends on the cause and the type of headache. It may include rest, fluids, reducing triggers, and medicines recommended by a healthcare professional. Ongoing headaches may need a plan that addresses both symptom relief and prevention. Frequent use of pain medicines can sometimes make headaches happen more often, so medical advice is important if headaches are recurring.
When to Seek Medical Care
Seek medical care if headaches are frequent, severe, getting worse, or different from your usual pattern. You should also get medical advice if a headache keeps returning, disturbs sleep, follows a head injury, or comes with vomiting, fever, neck stiffness, or eye pain. Children, pregnant people, older adults, and people with cancer or weakened immune systems should be assessed promptly for concerning headaches. New headaches after starting a new medicine also deserve review.
When It May Be an Emergency
Get emergency help right away for a sudden, explosive, or "worst headache of your life." Emergency care is also needed for headache with confusion, fainting, seizure, weakness, numbness, trouble speaking, trouble seeing, chest pain, severe shortness of breath, or after a significant head injury. A headache with high fever, stiff neck, rash, or persistent vomiting can also signal a dangerous condition. Do not drive yourself if you are severely unwell or have neurological symptoms.