a seedy district.
a sickly child.
a surge of ragged scruffy children.
as seedy as a fig.
feeling a bit indisposed today.
feeling poorly.
he was soiled and seedy and fragrant with gin.
is unwell and can't come to work.
my poor ailing grandmother.
sleazy characters hanging around casinos.
sleazy storefronts with...dirt on the walls.
the seamy side of life.
the sordid details of his orgies stank under his very nostrils.
the squalid atmosphere of intrigue and betrayal.
you look a little peaked.