Fatigue and Low Mood: — How to Tell the Difference

Tell them directly, even if it feels awkward: 'I have been feeling very low and I want to talk about it.' That sentence is enough to open the conversation. Your team will assess you and, if needed, refer you to a counsellor, clinical psychologist, or psychiatrist. You do not need to be certain it is depression before you raise it — your team will help you understand what is happening.

Worry and fear are normal during treatment. A persistent, settled sense that nothing will improve — beyond ordinary worry — is a different thing, and it is worth reporting. Hopelessness is a clinical symptom, not simply a reasonable response to a hard situation that you have to endure alone. If that feeling has been present for more than a couple of weeks, tell your team at your next appointment, or call before then.

Some antidepressants interact with certain chemotherapy drugs, which is why this is a clinical decision your oncologist and psychiatrist make together — not something to navigate on your own or from a patient forum. If you are already taking an antidepressant, tell your oncologist at your first appointment. If one is being considered, the interaction with your treatment will be checked before anything is prescribed.

Both directions are real. Persistent exhaustion that does not lift, combined with withdrawal and reduced activity, can contribute to low mood over time. And depression consistently makes fatigue feel more severe than it would otherwise. The two reinforce each other, which is why your team will assess both together rather than treating one and waiting to see what happens with the other.

Depression during cancer treatment is not a choice, a sign of weakness, or giving in. It is a recognised medical condition that occurs more often during cancer treatment than in the general population, and it responds to treatment. What helps is telling your team and getting support — not managing it alone or performing positivity for others. You can share that your doctor has advised it should be assessed. That often takes the pressure off both you and your family.

Depression and fatigue are both things your oncology team is trained to ask about and assess. You do not need to raise it apologetically — 'I want to talk about my mood' is a legitimate clinical question. If you find it hard to raise in a rushed appointment, ask a nurse to note it so the next visit has time for it. Psychosocial support is part of cancer care, not an add-on that takes up someone else's time.