The term small penis syndrome has been proposed to describe men who have excessive anxiety about the size of their penis and who have a clinically average sized penis. Individuals who have been diagnosed with a micropenis would not be considered to have small penis syndrome.
The researchers who first coined small penis syndrome suggest that it could be part of obsessive thinking, body dysmporphic disorder , or a larger psychosis.
They propose that psychological or counseling treatment should be the first course of action, with medications and surgery offering a less attractive option given the fact that there is nothing anatomically or clinically wrong with the penis.
Small penis syndrome is a new term, and one that would require a lot more research before being accepted. What is promising though is the focus on psychological and social interventions over pharmaceutical and surgical ones.
Source: Wylie, K.R. and Eardley, I. “Penis Size and the ‘Small Penis Syndrome’” BJU International Volume 99, No. 6 (2007):1449-1455.

