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A woman sits in the waiting room of the Federal Neuro Psychiatric Hospital in Maiduguri the capital of Borno State, northeastern Nigeria on September 16, 2016. 
The Federal Neuro Psychiatric Hospital has seen a surge in patients with disorders ranging from PTSD (post-traumatic stress disorder), depression, substance abuse, psychosis and anxiety since the beginning of the Boko Haram insurgency in 2009. In July, the United Nations said nearly 250,000 children under five could suffer from severe acute malnutrition this year in Borno state alone and one in five -- some 50,000 -- could die. But despite the huge numbers involved, the situation has received little attention compared with other humanitarian crises around the world -- even within Nigeria. / AFP / STEFAN HEUNIS        (Photo credit should read STEFAN HEUNIS/AFP/Getty Images)
A woman sits in the waiting room of the Federal Neuro Psychiatric Hospital in Maiduguri the capital of Borno State, northeastern Nigeria on September 16, 2016. 
The Federal Neuro Psychiatric Hospital has seen a surge in patients with disorders ranging from PTSD (post-traumatic stress disorder), depression, substance abuse, psychosis and anxiety since the beginning of the Boko Haram insurgency in 2009. In July, the United Nations said nearly 250,000 children under five could suffer from severe acute malnutrition this year in Borno state alone and one in five -- some 50,000 -- could die. But despite the huge numbers involved, the situation has received little attention compared with other humanitarian crises around the world -- even within Nigeria. / AFP / STEFAN HEUNIS        (Photo credit should read STEFAN HEUNIS/AFP/Getty Images)

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Military conflicts, natural disasters and assaults can all trigger PTSD which is estimated to affect 1 in 10 people at some point in their lives.

What is PTSD?

Military conflicts, natural disasters and assaults can all trigger PTSD which is estimated to affect 1 in 10 people at some point in their lives.