Patients with lung cancer have plenty of reasons to feel fatigue. Similar to all types of cancer, the tumour consumes a large deal of energy that is meant to nurture our cells, and this contributes to feeling low energy levels and muscle weakness. At the same time, there is severe metabolic stress as the disease progresses, and it leads to progressive fatigue.
However, lung cancer patients have yet another reason to feel tired. Their respiratory system is not functioning at its best, and sometimes it is even difficult to breathe properly. Additionally, these patients are often dehydrated when difficulty to swallow starts, and they become malnourished, which adds up to the low energy problem.