The lesions on corner of lips may be herpes simplex
It is viral infection..caused by HSV virus mostly type 1.
It is relapsing condition and remains localised.
Anxiety and worries might precipitate the disease.
Immunocompromised conditions are to be ruled out by blood tests.Antiviral
in proper dose may be taken for long time.
Immunobusters like levamisole
may be taken.
Acyclovir cream may be applied on the lesions till recovery.
I hope you got my answer.
Dr. Ilyas Patel MD