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.
Common STD Symptoms in Women: 1  No symptoms. 2  Discharge (thick or thin, milky white, yellow, or green leakage from the vagina) 3  Vaginal itching.  Vaginal blisters or blisters in the genital area (the region covered by 1  underwear) Vaginal rash or rash in the genital area.  Burning 1  urination. Painful urination.  Pain during intercourse.