system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Earliest complaint of OSMF patient is:
assistant
The correct answer is  Prodromal Symptoms (Early OSF) 
This includes a burning sensation in the mouth when consuming spicy food, appearance of vesicles especially on the palate, ulcerations or recurrent generalized inflammation of the oral mucosa, excessive salivation, defective gustatory sensation and dryness of the mouth. There are periods of exacerbation manifested by the appearance of small vesicles in the cheek and palate. The intervals between such exacerbations vary from 3 months to 1 year. Focal vascular dilatations manifest clinically as petechiae in the early stages of the disease.
Reference: Shafer’s Textbook of ORAL PATHOLOGY Eighth Edition page no 148