Why writers fall into a writer’s block

When you talk about the different reasons that might lead a professional writer to experience this painful situation of being stuck in a writer’s block then you also need to understand that what might be the causes that make a writer fall into this condition. You can always hire a ghostwriter to avoid going through such a situation but that is not a solution. If you know the causes then you can work on them to come out of this condition. According to most experts, the main reason why a writer falls in to this condition is because of stress. What other reasons or causes might be there?