The camps have evolved over the years. Unlike the concentration camps they tend to resemble, there are no fences. People are free to move. However, as most lost land and livelihood, they have nowhere else to go. This is especially true of widows with children, the elderly, disabled and orphans.
Some camps are as large as small cities.
Relief services were sent in, at first to provide food and shelter, eventually providing aid for hardship cases. Every camp has a health clinic run by the agency. They provide 10 years of free preventative and monitored care to mothers and children. They also provide five years free services for diabetes, diagnostic and dental care. Two hospitals have been established, a small one in the West Bank and a 232-bed general hospital under construction in Gaza.