headache

noun

head·​ache ˈhed-ˌāk 

1

: pain in the head

2

: a vexatious or baffling situation or problem

… meetings had become a giant headache.

—Franklin Foer

headachy adjective

or less commonly headachey

ˈhed-ˌā-kē 

Synonyms of headache

• job
• killer
• burden
• effort

Examples of headache in a Sentence

I'm starting to get a headache.

The symptoms include fever and headache.

The city's biggest headache is traffic.

Managing your finances can be a real headache.

Recent Examples on the Web

Mild side effects are common – including soreness at the injection site, headache and fatigue – but serious side effects have been generally rare. — Deidre McPhillips, CNN Money, 4 Aug. 2026

The Rice and Vanderbilt team overcame that headache entirely. — Mrigakshi Dixit, Interesting Engineering, 3 Aug. 2026

In September 2025, after experiencing persistent headaches, Conor was diagnosed with glioblastoma, an aggressive form of brain cancer. — Toria Sheffield, PEOPLE, 2 Aug. 2026

Low energy, fatigue, dizziness, lightheadedness, headaches, fainting, brittle or thin nails, hair loss, cravings to chew ice and restless legs syndrome are a few signs, according to Thomas. — Amy McGorry, FOXNews.com, 1 Aug. 2026

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Phrases Containing headache

• cluster headache
• ice-cream headache
• pre-headache
• sick headache
• splitting headache
• tension headache

Rhymes for headache

• awake
• backache
• beefsteak
• betake
• cheesecake
• cupcake
• daybreak
• earthquake
• forsake
• gouache
• handshake
• heartache

Video

An Abbreviated History of American English Spelling

Soop, wimmen, and headake did not make the cut

Kids Definition

headache

noun

head·​ache ˈhed-ˌāk 

1

: pain in the head

2

: an annoying or baffling situation or problem

headachy

-ˌā-kē 

adjective

Medical Definition

headache

noun

head·​ache ˈhed-ˌāk 

: pain in the head

called also cephalalgia

headachy

-ˌā-kē 

adjective