When you are unwell, or recovering from an operation or infection, it can sometimes be hard to eat well. You might not feel like eating, or you may be suffering from symptoms or side effects of your illness, treatment or medications, which can affect your appetite and ability to eat.
This can make it difficult to get enough of what your body needs to recover and could lead you to becoming weaker and having less strength and energy than usual. You may find yourself losing weight, even if you are not trying to do so. Over time, if you do not have enough food to eat, you may unintentionally lose weight and become malnourished. It can also make you more likely to pick up an infection.