Problem while applying lots of kajal(kohl) in lower lids of eyes?

I've been wearing kajal(kohl) for 4 years now. initially started with the stuff u can take in the finger and apply then i switched to pencil kajals. So the volume of kajal i apply on my lower lids is more nowadays.Of late I've noticed something very wierd. U know when we have cold how we'll feell mucus or phlegm buliding up in our throats n we'll cough it up n spit right? that time we'l get usually greenish or yellowish phlegm(sorry for making this disgusting guys!) BUT IN MY CASE i get a black splotch in between my saliva..small threads of black in my saliva i noticed once when i spit in a white wash basin..i guess is my excessive kajal...this happens on most days when i put a lot of kajal..it comes out through my mouth basically guess it is cos eyes, mouth,nose everything is interconnected...but it freaks the hell out of me...any ideas on why this happens and how it can be avoided and whether it is harmful to my health??? i apply kajal only on the lower lid of my eyes...please help.Problem while applying lots of kajal(kohl) in lower lids of eyes?
It is allergy and the solution is to avoid kajal. You may try home made kajal and see if it suits you.