Headaches are common and usually not concerning, but occasionally they can be caused by a serious illness.
There are many different types of headaches, such as tension, migraine and cluster headache caused by sinus problems, alcohol or dehydration.
Most headaches can be managed by avoiding triggers and taking pain relief medicines, but some types of headaches respond to other treatments.
See your doctor if your headaches are interfering with your day-to-day activities, getting worse, or changing in any way.