Introduction: Squamous Cell Carcinoma is the most frequent of oral carcinomas and represents approximately 3 % of all human malignant tumors and significant health problem in world wide. Oral cancer is most common malignancies in Southeast Asia. In India oral cancer affected most of younger persons due to various chewing habits. This study was to delineate the causative factor and increase the awareness of oral cancer and precancerous lesion & Conditions among Bareilly population. Material and Methods: The study group consisted of 100 subjects of both the sexes, with clinically suspicious premalignant lesions. Toluidine blue stain use as a mouth rinse or applied locally to sites of tissue changes with cotton applicators, used as for identifying oral lesions, accelerating decision to biopsy, and guiding biopsy site selection process. Results: Among the 100 subjects, 4% (04) were alcoholic, 8% (08) were alcoholic and chewing tobacco, 38% (38) were chewing pan masala/guthka, 8% (08) were habitual smokers, 20% (20) were chewing pan masala/guthka and smoking, 16% (16) were chewing tobacco and 6% (06) had no habits. Conclusion: The study was conducted to determine the patterns of various types of chewing habits and to evaluate the correlation between an individual quid chewing habit and a Oral mucosal lesion. Subjects who were using Betel/ Areca as one of the constituent of the quid showed predominantly OSMF, and leukoplakia was seen in all the subjects who were chewing tobacco as one of the ingredients of the quid.