Small red bumps on the tip of the tongue may be tongue papillae hyperplasia, mucous gland cysts, Kawasaki disease, herpes stomatitis, vitamin B deficiency. 1. Hyperplasia of tongue papilla: it may be related to long time eating dry, hard, spicy and irritating food, or repeated stimulation of tongue papilla by tooth stumps and crowns. 2. Mucous gland cysts: The mucous glands distributed in the oral mucosa and submucosal tissues of the tongue form small cysts due to trauma, resulting in the exposure of mucus. 3. Kawasaki disease: this disease is a non-specific vasculitis lesion that mainly involves coronary arteries and other blood vessels of the whole body, and the main clinical manifestations are bulbar conjunctival congestion, rash, dry and cracked lips and mouth, and strawberry tongue (red dots on the surface of the tongue). 4. Herpetic stomatitis: herpes simplex virus infection of the oral mucosa appears as aggregated blisters, and red bumps may appear on the surface of the tongue after the blisters rupture, accompanied by fever, chills, malaise and other systemic symptoms. 5. Vitamin B deficiency: Vitamin B is involved in the process of metabolism and enzymatic reactions of many substances in the body, and the lack of vitamin B can lead to stomatitis, lingual inflammation, seborrheic dermatitis and other diseases, so this symptom appears. Small red bumps on the tip of the tongue may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.