This is some information I got after searching
There are three types of tears only one of
which is associated with crying. One type, known
as basal tears, continuously lubricate our
eyeballs while another, reflex tears, are
produced when our eyes become irritated, as when
we chop onions. The third type are generally
referred to as emotional tears and are what
are produced when we cry as part of our response
to a range of psychological triggers. Such crying
tears not only have a different cause but also
have a different concentration of chemicals,
hormones and proteins to both basal and reflex
During stress (strong emotions or pain) our
bodies produce increased amounts of brain
signal proteins and extra stress hormones.
Tears produced under these conditions contain some
of these proteins and hormones. They get rid of
some of the components associated with our
discomfort. This may be why so many people feel so
much better after a good cry.
While it may not be something you want to do
often, a good cry might be beneficial on
I hope this answers your question.
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