Cytokines are small proteins that play a crucial role in the immune system. They act as signaling molecules, helping cells communicate with each other during immune responses. When the body detects an infection or injury, cytokines are released to coordinate the activities of various immune cells, such as T cells and B cells, ensuring a swift and effective response. These proteins can have different effects depending on their type and the context in which they are released. Some cytokines promote inflammation to help fight off pathogens, while others can reduce inflammation to prevent damage to healthy tissues. This balance is essential for maintaining overall health.