When the solid has a high affinity for water - in which case it is called hydrophilic (high energy e.g. glass)- water spreads. In the opposite case of hydrophobic (low energy e.g. teflon) surfaces, water does not spread but, instead, forms at equilibrium a spherical cap resting on the substrate with a 'contact angle'.
Infections such as trichomoniasis, gonorrhea, and Chlamydia (all STDs); and yeast infection can all cause vaginal discharge. Vaginal discharge can be associated with other symptoms such as burning or itching. Antibiotics are given for infections that cause vaginal discharge.
Thick, white, cheesy discharge â This is usually a sign of a yeast infection. May also be accompanied itching or swelling around the vulva. White, yellow or grey discharge â Especially if accompanied by a fishy odor, this type of discharge is likely a sign of bacterial vaginosis.