i think u're not drinking enough water?
"The green color implies an advanced stage of fluid (dampness)
stagnation (stasis) in the body. The color of dampness while it's
in the initial stage is clear-transparent. This implies rhinitis at
the initial stage or coughing. When this dampness stays unresolved
for a long period (or when the stagnation energetic process is
acute and fast developing), the color darkens. it becomes white,
yellow, green and sometimes even black. It also gets less fluid in
nature, sticky and congested. In advanced pathologies it may turn
into a cyst and even tumor or cancer. The color implies the degree
of stagnation in the body in many instances."