bashful
/ˈbash-fəl/
adjective
socially shy or timid : diffident, self-conscious
resulting from or typical of a bashful nature
He was bashful as a child.
noun
paruresis
Patients with bashful bladder typically are unable to void anywhere but at home and in private, which can adversely affect occupational options and can limit many aspects of life.
noun
an inability to urinate in the presence of others (as in a public restroom) : the fear of being unable to initiate or sustain urination when other people are nearby —called also bashful bladder, bashful bladder syndrome, shy bladder, shy bladder syndrome
Paruresis, or intense fear of public urination, is common and often disabling. Many people are simply unable to relieve themselves during, for example, a busy break time.