I think it's hypoallergenic toothpaste, which contains some desensitizing ingredients and can relieve dentin allergy to some extent. For example, stannous fluoride can block the stimulation of cold, hot, sweet and sour, and relieve soreness. If you are in the sensitive period of dentin and eat hot or cold or too sweet and sour food, your teeth will tingle, and you need to choose toothpaste specifically for sensitive teeth just after filling your teeth.