Trigger foods can worsen irritable bowel syndrome (IBS) symptoms. Dairy, fatty or fried items, processed snacks, alcohol, caffeine, and spices are common culprits of IBS triggers. To help manage symptoms, it is best to avoid trigger foods such as IBS home remedies. Keeping a food diary can help determine which foods are causing symptoms, or speaking to a dietitian can provide insight into your best diet plan, such as the low FODMAP diet. A dietitian can also help ensure your diet includes the right nutrients to reduce IBS symptoms.