If your wife’s underwear has such stains, you should know that

odorless;

white or transparent;

thick and sticky or watery and slightly elastic.

However, if the discharge seems unusual, it could indicate:

Condition Characteristics of the discharge
Candida (fungal infection) lumpy and “grainy” consistency
bacterial vaginosis strong “fishy” odor
Trichomoniasis yellow or greenish foamy discharge
Contact a specialist if you experience: