Any acidic food causes food erosions. Food substances like soft drinks, pickles and lemon are highly acidic as their Ph levels are very low. Such acidic food substances will harm the outer surface of the tooth called enamel. The outer surface of the tooth called enamel gets soften with the acidic diet which you consume.
The soft enamel is removed over a period of time by exposing the inner layer called dentin. Dentin is the underlying layer of tooth which is very soft in appearance and full of nerves. Exposure of nerves through dentin leads to sensitivity. You will feel more pain and extreme sensitivity when you eat sweet and cold fruits.
Fruits with alkaline Ph (above 7) are good for your teeth as they do not harm your teeth. Dairy products like milk and cheese are alkaline food products. When you eat acidic food products, rinse your mouth thoroughly and consume alkaline food products.
So after an acidic meal before going to bed time, brush your teeth with fluoridated toothpaste. Fluoridated toothpaste is known to rebuild the lost enamel due to erosion. When you consume soft drinks, use straws and do not hold it in your mouth for longer time. Try to avoid acidic food substances to prevent tooth erosion.