Is Coffee Consumption Good For All? Know The Side Effects Of Coffee Headache: Drinking large amounts of coffee can cause headaches Insomnia: Consuming too much caffeine can cause insomnia or difficulty sleeping Nervousness and irritability: High caffeine intake can lead to nervousness and irritability Frequent urination: Drinking more than 4 cups of coffee a day can cause frequent urination or inability to control urination Fast heartbeat: High caffeine intake can cause a fast heartbeat Muscle tremors: Drinking more than 4 cups of coffee a day can cause muscle tremors Anxiety: High levels of caffeine consumption can lead to anxiety Digestive issues: Large doses of caffeine may lead to loose stools or even diarrhoea in some people Addiction: Caffeine is a stimulant that can cause addiction High blood pressure: In several studies, caffeine has been shown to raise blood pressure due to its stimulatory effect Inputs By: Kanikka Malhotra (Consultant Dietician & Diabetes Educator)