[[https://www.verywellhealth.com/headache-at-night-5220207|
What to Do If You Get Headaches at Night ]]

[[https://www.healthline.com/health/headache-at-night|
Why Do I Get a Headache at Night?]]

[[https://www.mayoclinic.org/diseases-conditions/chronic-daily-headaches/expert-answers/nighttime-headaches/faq-20057919|
Nighttime headaches: How can I get relief?]]

Headache at night that gets better in morning may be caused by various factors, such as insomnia, depression, anxiety, snoring, sleep apnea, grinding your teeth, strained muscles, hangovers, TMJ disorders, or medications. 

Some common headache types, such as cluster headaches and migraines, may also occur during sleep or at night in some people. It is important to see a doctor for an accurate diagnosis and treatment for nighttime headaches.

There are several reasons why you may experience headaches and digestive issues at night.

High blood pressure

Stress and anxiety

Eating fatty foods and sugar at night

Sinusitis

Abdominal distention or acid reflux

Autonomic dysfunction

H. pylori infection, IBS, or celiac disease

Mood disorders such as anxiety and depression

Constipation

Migraine episodes, tension headaches, or chronic headaches

[[https://www.yellowpages.ca/tips/why-do-i-always-get-headaches-at-night/|
 4 explanations for why you always get nighttime headaches ]]

[[https://www.healthline.com/health/gastric-headache|
The Link Between Headaches and Stomach Trouble]]

[[https://www.doctorshealthpress.com/connection-between-digestive-problems-and-headaches/|
Digestive Health and Headaches Linked?]]

[[https://www.medicalnewstoday.com/articles/gastric-headache|
What to know about gastric headaches]]

[[https://www.healthline.com/health/digestive-health/can-constipation-cause-a-headache|
Can Constipation Cause a Headache?]]