In addition to hair loss and fatigue, breast cancer treatments can have several other less-known side effects. These include loss of appetite, nausea, mouth sores, weight gain, weakened immune system, infertility, and cognitive issues sometimes referred to as 'chemo brain.' To cope with these side effects, consider the following tips: for loss of appetite, try to eat small, frequent meals and include nutrient-dense foods; for nausea, ask your doctor about anti-nausea medications and try ginger tea; for mouth sores, maintain good oral hygiene and avoid spicy foods; for weight gain, consult your doctor before making dietary changes; to boost your immune system, avoid large crowds and sick individuals during treatment; for infertility concerns, discuss fertility preservation options with your doctor; and for cognitive issues, keep a journal to track symptoms and talk to your healthcare team for support. Always communicate any side effects with your healthcare team to find the best ways to manage them.