Fruits like mango, lemon and watermelon are not recommended for gastro sinusitis. However, there is no such thing as the most feared fruit for sinusitis. 1. Mango: Mango contains high sugar content, eat too much mango can lead to the stomach produce too much stomach acid, stimulate the gastrointestinal mucosa, leading to worsening of the symptoms of sinusitis. 2. Lemon: Lemon belongs to the acidic fruit, contains a lot of acid, gastric sinusitis patients eat lemon, easy to stimulate the gastric mucosa, resulting in the condition is not easy to recover. 3. Watermelon: Watermelon, especially chilled watermelon, is easy to stimulate the gastric mucosa, causing an increase in the secretion of gastric acid, and can also cause stomach cramps and abnormal power, leading to stomach pain, bloating and other aggravations. Suffering from gastro-sinusitis, must actively listen to the doctor’s advice for treatment, follow the doctor’s advice for dietary regimen, to avoid aggravating the condition.