It's estimated that one in seven people are affected by migraines.
The World Health Organization has launched its first ever guidelines on how people can help avoid getting dementia.
It looked at the evidence of what works and what doesn't for lowering risk.
Things to avoid include smoking and drinking too much alcohol.
While eating a healthy diet is beneficial, popping vitamin pills makes no difference to dementia risk, it advises.
Read the full guidelines here.
Astonishingly, every 90 seconds someone in the UK is taken to hospital with a brain injury. A report commissioned by a group of cross-party MPs found that while immediate care was invariably excellent, the rehabilitation process was often less satisfactory. Mandy Baker reports. If you'd like to hear more from Today In Parliament, tune in to BC Radio 4 at 11.30pm
Pokémon experts have developed a unique cluster of brain cells devoted to recognising the hundreds of different characters in the famous video game. Author of the study Jesse Gomez explains what this reveals about the brain's ability to store and categorise information. (Image: 20 Pikachu characters. Credit: Yoshikazu Tsuno/Gamma-Rapho/Getty Images)
Comedian Carys Eleri says people need to interact face to face with their friends to combat loneliness.