Thanks for detail history.
You ate mango and you develop erythema
with vesicles at angle of mouth.
It seems that you may be having mango dermatitis
Do not worry, the disease will clear in few days.
Apply antibiotic cream.
Take oral antibiotics
with short course of steroids
Do not prick the lesions.
I hope you got my answer.
Wishing you fast recovery.
Dr. Ilyas Patel MD