Wound is wet, warm and dark. A perfect environment for the yeast or fungus to grow. Yeast and fungus, like germs, will keep the wound open for the exact same reason and mentioned above. Common use of over the counter topical antibiotics such as bacitracin and neomycin can cause yeast to grow faster by suppressing some germs that are in competition with the yeast. Anti-fungal treatment may be necessary when yeast infection is the cause of non-healing.