I am five months pregnant and i keep getting really bad headaches what could cause that or is it a worry?

Headaches during pregnancy are common, especially during the first trimester. They are usually caused by hormonal changes, increased blood volume, and stress. These headaches are typically not a cause for concern and can be managed with over-the-counter pain relievers, such as Tylenol (acetaminophen).

Here are some other things that can cause headaches during pregnancy:

* Dehydration: Drinking plenty of fluids can help to relieve headaches.

* Lack of sleep: Getting enough rest can help to reduce headaches.

* Caffeine withdrawal: If you are a regular coffee or tea drinker, cutting back on caffeine can cause headaches.

* Sinus congestion: Sinus congestion can cause headaches, especially if you have allergies or a cold.

* High blood pressure: High blood pressure can cause headaches, especially if it is sudden or severe.

If you have any of these symptoms along with your headache, it's important to see your doctor right away:

* Severe headache that doesn't go away

* Headache that gets worse when you lie down

* Headache that is accompanied by vision changes, dizziness, or nausea

* Headache that is accompanied by a fever or stiff neck

In most cases, headaches during pregnancy are not a cause for concern and can be managed with simple lifestyle changes. However, if you are concerned about your headaches or if you have any of the symptoms listed above, it's important to see your doctor.