Oral mucosa reactive hyperplastic lesions encompass a spectrum of benign lumps and growths arising from the oral mucosa in response to various stimuli. Common examples include fibrous hyperplasia, pyogenic granuloma, and irritation fibroma. These lesions often manifest as painless, exophytic masses, requiring clinical and histopathological examination for diagnosis. Understanding their aetiology, histopathology, and management is crucial for diagnosis and appropriate treatment planning.