1. People who already have diarrhea and diarrhea should not eat plantain seed shells, or the symptoms leading to diarrhea are more serious.

2. Diabetic patients should be careful to eat plantain seed shell, because plantain seed has diuretic effect, and diabetic patients should eat it under the orders of doctors.

3. People with kidney deficiency and cold body, and people who are prone to fatigue should be careful to eat plantain seed shells.