The most common vaginal infections are yeast infections (also called candidiasis or thrush), trichomoniasis, or bacterial infections (also called bacterial vaginosis). Symptoms of an infection may include irritation, itching, discharge and odour. To make a diagnosis a doctor will usually do a vaginal swab, which involves wiping a type of cotton bud gently across the infected area. The swab is then sent to the lab for analysis. There are many drugs that can successfully treat these infections.