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.
1 Itâs normal to have a white/yellow vaginal discharge that does NOT have an odor (smell). 2  Vaginal odor, itching, burning, pain and/or a different discharge are symptoms of an infection. 3  If you have any symptoms of a vaginal infection, call your health care provider.