(Cold Sore):Reactivation of latent Herpes Simplex Virus-1 triggered by sunlight, stress, and hormonal changes. It is characterised by the presence of crusting blisters on the upper lip. Chicken Pox: A type of viral infection which is caused by Varicella Zoster Virus and presents in children. Numerous itchy blisters are found on the face and body. Blisters could also be found on inner cheek and palate of the mouth. Herpes Zoster/Shingles: Viral infection caused by reactivation of latent Varicella Zoster Virus and found in adults. Patients can present with acute pain before or after the onset of blisters. If viral reactivation occurs in the facial nerve, it can cause Ramsay-Hunt Syndrome in which patients can develop facial paralysis, blisters around the ears and on the tongue, and loss of tongue sensation. Hand, Foot, and Mouth Disease: A highly contagious viral infection which infects young children and is caused by Coxsackie Virus A16. It is characterised by presence of small blisters all over the limbs and the mouth. Measles: A highly infectious condition which is caused by Measles virus. It most commonly presents in young children who have not been vaccinated. It is characterised by presence of white spots (Koplik's Spots) which rupture to form ulcers on the palate. 6. Papillomas and warts/ verrucae They are caused by various strains of the Human Papilloma Virus (HPV) of which there are more than 100 strains but usually due to HPV types 6 and 11 (2). Papillomas are mostly spiky, finger like projections, or cauliflower head rounded lobular shaped. Usually painless and singular. Verrucae usually appear on the lips. Verrucae Vulgaris is associated with HPV types 2 and 4. HPV types 16 and 18, designated high risk due to association with cancers, do not present like this in the oral mucosa but as white patches (1). Multifocal Epithelial Hyperplasia (Heck Disease) is rare, usually familial, swellings appear in multiples and are more common to some Native American and Inuit groups. Verricuform Xanthoma, a rare lesion which may resemble papilloma, is often white due to hyperkeratosis, usually appear in 50-70 year age group, commonly on the gingivae. They may be mistaken for papilloma or verrucous leukoplakia but are benign (1). Bacterial Syphilis- Bacterial infection which is usually sexually transmitted. It is caused by bacteria Treponema Pallidum and it has different types of oral presentation at different stages of the disease. Fungal Oral fungal infections are