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.
Trichomoniasis is a sexually transmitted disease that can cause vaginal itching and discharge and pain. A skin abscess, or boil, is a swollen, painful, red and warm lump of skin that may rupture and drain pus. Cervicitis, an inflammation of the cervix, causes pelvic pain, bloody or yellow vaginal discharge and more.