Eating watermelon in moderation generally does not cause acne, but it can cause acne if eaten in large quantities. Eating watermelon in moderation generally does not cause acne. Because watermelon is rich in vitamin C and other nutrients, vitamin C has a certain antioxidant and free radical scavenging effect, and some studies have shown that vitamin C can shorten the treatment time of acne, so eating watermelon in moderation is generally not caused by acne. However, excessive consumption of watermelon may cause acne. Because the sugar content in watermelon is relatively high, if the body consumes too much sugar, it can trigger or aggravate acne, so it is not recommended to consume large amounts of watermelon. Moderate consumption of watermelon generally does not cause acne. If acne occurs, it is recommended that patients seek medical attention in a timely manner to complete the relevant examinations and then deal with the cause of the disease.