Cytokines are secreted in response to infection, trauma, or malignancy. Cancer results when cells can no longer regulate their proliferation and differentiation. Cell processes that are linked to cancer development involve bypassing apoptosis, growth suppressors, and immune system regulation, developing new vasculature (angiogenesis), and metabolic changes. Many of these processes involve cytokine signaling and crosstalk between cancer cells and immune cells. The effects of cytokines on cancer patients can be complex and depend on many factors, including the type and stage of cancer, the patient's immune status, and the specific cytokines involved. Understanding the role of cytokines in cancer is an active area of research, and new therapies targeting cytokines are being developed to improve cancer treatments. More than half of the patients with cancer develop cachexia. This condition is related to the role of cytokines and mediators in creating this specific environment. Cancer cachexia is a complex syndrome characterized by the loss of skeletal muscle mass with or without loss of fat mass which cannot be fully reversed using standard nutritional care and affects outcomes, response to cancer treatments, survival, and quality of life. Cytokines play a crucial role in the development of cancer cachexia, and targeting cytokine signaling pathways may be a promising approach for the prevention and treatment of this debilitating condition in cancer patients.