1. Blueberries can't be eaten together with dairy products. Some ingredients in blueberries can lead to protein solidification, so they can't be eaten together with dairy products such as milk.

2. Avoid eating blueberries with high-calcium foods. The oxalate of blueberries will affect the absorption of calcium by human body. Therefore, if you want to strengthen calcium, avoid eating blueberries with high-calcium foods such as calcium tablets, sesame seeds and milk, and the interval should not be less than 3 hours.

3. Stop eating, and don't eat too many blueberries at a time, just 1-2. Because blueberries contain oxalate, excessive consumption will produce crystals in the body, which is harmful to the body.

4. People with diarrhea should eat carefully. Blueberry is a kind of fruit with high nutritional content, which has the effect of promoting urination and convenience. For people with diarrhea, it will aggravate the condition.

5. People with diabetes should eat carefully. Blueberries contain some sugar, so they are not suitable for people with diabetes.

6. Be careful when eating kidney or gallbladder diseases. Patients with such diseases should avoid eating too many blueberries, which will aggravate the symptoms.