Hi Adnan, Welcome to HealthcareMagic Forum.
Your History suggests you have Herpes
Labialis Infection which is the Viral Infection caused by Herpes Virus. Kindly don't worry as it is not serious, and easily treatable.
Get yourself examined by a Physician, so the he/she can examine you and Prescribe anti viral Topical Creams after confirming it.
You will have to apply it as directed by your Doctor and go for regular follow up. If needed your Doctor may also ask you to take Oral Anti viral drugs, but it is rare.
Eat healthy nutritious balanced diet which should include fresh fruits and green leafy vegetables. Exercise regularly and drink plenty of water. Avoid stress
Wish you Good Health.