Consuming too many acidic foods or beverages, such as many glasses of lemon water per day, could cause your teeth to have a constant amount of acid washing over them. This will erode tooth enamel and make your teeth extra sensitive to hot or cold foods. To protect your teeth, it is recommended to drink acidic beverages through a straw. If you're already experiencing tooth erosion, consult a dentist for treatments such as bonding or sealers.