Why am I so tired, and will it go away?

This is not ordinary tiredness and sleeping more does not fix it. Your body is repairing damage, your blood counts may be low, and the illness itself uses energy.

For most people it lifts over weeks to months after treatment ends, though it can take longer. Tell your team how bad it is, because some causes they can actually treat.

Written by two physicians. Checked against patient information from the US National Cancer Institute and Cancer Research UK.