Maiduguri alone is estimated to host between 1.2 million to 2 million refugees.
Since the Boko Haram insurgency began, more people have migrated to Chad, Niger. Maiduguri alone is estimated to host between 1.2 million to 2 million refugees.
One photographer Dominic Nahr however is documenting the refugee crisis through his lens.
Two young children sleep on a blue mat outside the pediatric ward in the main hospital in Bol in Chad.
All of the inhabitants drink the water directly from the lake, creating health risks due to the lack of proper sanitation.
Many have left because the lack of food and decided to go back to their villages on islands, risking Boko Haram or government attacks.
A young woman is carried to a mobile clinic after travelling on a horse and cart for over 30km before being brought to the main hospital in Bol from Yakoua town.
As violence and attacks were too much for the villagers to bare, they decided to return back to where their ancestors had begun. Now they are surrounded by dried up rivers and desert.