Brief Answer:
it could be candidal infection
Detailed Answer:
Hi,
Thanks for writing to us.
Angular cheilitis can occur due to vitamn b deficiency(
riboflavin), drooling of saliva,frequent licking of lip, yeast infection.
A persistently white tongue or tongue covered with white slough points towards yeast infection. However leucoplakia which is associated with smoking and tobacco should also be ruled out.
Also yeast infection is common with decreased immunity, use of steroids, antibiotics, chronic illness, diabetes etc
Though candidal
balanoposthitis is sexually transmitted but can occur otherwise also without contact. So if your girl friend has no such symptoms or she developed symptoms later then probably you didn't get it from her.
Usually in oral candidal infection, oral
fluconazole 200mg daily or 150 mg stat dose and 100mg daily dose for 10 days helps. Plain angular cheilitis would respond to
topical steroid antifungal cream. You should also take oral b complex vitamin for few days.
I can only comment upon your girl friend's condition, if you could attach images of her face.
Hoping to hear fron you soon.