what  causes darkness on elbows
Here are some of the common causes of dark elbows: 1  Genetics. 2  Dry skin. 3  Overexposure to the sun.  Use of certain 1  medications. Poor or improper hygiene.  Lack of exfoliation, accumulation of dirt, grime and dead 1  skin. Certain diseases such as Addisonâs syndrome, obesity.  Hormonal imbalances.