The word overcrowding refers to the piling up or accumulation of people or animals in a single place and which does not have the physical dimensions to house them. In other words, the number of people who are there exceed the total capacity of the space and it does not have the corresponding safety and hygiene.
People who live in overcrowding are going to be affected not only by the discomfort of having to share a very small space and where it is practically impossible to make any movement, but also that because of this it will be practically impossible for that place to observe hygiene and satisfactory security, clearly affecting people's health, and even in the most extreme situations there may even be a risk of life in crowded settings.
This is a problem that affects everyone today, due to the number of people who live in it, since there are fewer and fewer spaces to live. Where this phenomenon is most evident is in the great cities of the world, since it is in these where most of the people want to live because of the employment, development or educational possibilities that they offer in contrast to other less populated places in the world but with a deficit in terms of opportunities.
On the other hand, poverty also turns out to be a generator of overcrowding situations. Faced with the scarcity of economic resources, due to not being able to pay the rent for a decent home, which has several rooms, the poor have no choice but to live together in small houses, and in the most extreme cases even in minimal rooms, which must share.