Can cooling fruits treat mouth ulcers?
Generally, cold-natured fruits cannot treat oral ulcers. Consuming cold-natured fruits during an episode of oral ulcers may even worsen the condition. Detailed explanation is as follows:

Development of oral ulcers is often related to factors such as reduced immunity, mental stress, nutritional deficiencies, or damage to the oral mucosa. It is not simply caused by excessive internal heat or fire. Cold-natured fruits do not have the function of repairing oral mucosa or promoting ulcer healing, so they are naturally unable to treat oral ulcers. On the contrary, during an episode of oral ulcers, the oral mucosa already has open wounds. Cold-natured fruits such as kiwifruit and lemon often contain high levels of acidic content, which may irritate the wounds and cause or exacerbate pain. Furthermore, some individuals inherently have weak spleen and stomach function, and consuming cold-natured fruits can burden the digestive system, impairing normal bodily functions and the healing process, thereby delaying ulcer recovery or even slowing down wound healing.
During an episode of oral ulcers, it is advisable to choose mild fruits with minimal irritation, such as apples and bananas. When consuming, try cutting them into small pieces or mashing them into puree to reduce irritation to the wound. Additionally, maintain good oral hygiene and avoid consuming excessively hot, hard, or spicy foods. If oral ulcers persist for a long time or recur frequently, timely medical consultation is recommended to rule out other underlying diseases.