What it is
Sometimes depression is the direct physiological result of another illness, not simply an understandable emotional reaction to being sick, but a biological consequence of the disease itself. An underactive thyroid slows the whole body, including mood. Stroke, particularly in certain brain regions, commonly produces depression. Parkinson's disease, HIV, some cancers, diabetes, anaemia and chronic kidney disease are other recognised causes.
The distinction matters because the first treatment is the underlying condition. Correcting a thyroid deficiency, treating anaemia, or stabilising HIV with antiretroviral therapy can lift mood substantially. Depression treatment (therapy, and antidepressants where appropriate) then addresses what remains, and is safe and effective alongside treatment for most medical conditions.
Why it matters in our context
In African health systems, where one clinic visit may be all a person gets, the lesson cuts both ways. Anyone diagnosed with depression deserves basic medical screening, and anyone living with a chronic illness such as HIV or diabetes deserves to have their mood asked about, because depression in chronic illness is common, treatable, and when untreated it undermines adherence to the medical treatment itself.
If you live with a chronic condition and your mood has been persistently low, raise it at your next appointment. It is not a separate, lesser problem; it is part of your health.
Sources
- American Psychiatric Association. (2022). DSM-5-TR.
- Robinson, R. G., & Jorge, R. E. (2016). Post-stroke depression: A review. American Journal of Psychiatry, 173(3), 221-231.
- Moussavi, S., et al. (2007). Depression, chronic diseases, and decrements in health: Results from the World Health Surveys. The Lancet, 370(9590), 851-858.