Swimming can be a beneficial activity for many cancer patients, but it is essential to consult with your healthcare provider before engaging in any new physical activity. The suitability of swimming for cancer patients often depends on the type of cancer, the stage of the disease, and the treatments they are undergoing. For instance, individuals undergoing chemotherapy or radiation therapy may have compromised immune systems, making them more susceptible to infections. In such cases, swimming in public pools might not be advisable.