These are people who shouldn't drink coffee. People who shouldn't drink coffee.

Although drinking coffee has a certain health effect on the human body, it is not suitable for everyone, especially for patients with poor physical condition or some diseases, it will be harmful to the health after drinking.

Overtired: although drinking coffee when overtired can get temporary excitement and reduce drowsiness, it will be more tired and do more damage to the human body after excitement.

Insomnia patients: drinking strong coffee will increase the secretion of adrenocortical hormones, make the cerebral cortex excessively excited and lead to insomnia, aggravating the condition of insomnia patients.

Pregnant women: caffeine can lead to abnormal development of the baby's nervous system, even mental retardation and dementia. It can also reduce fetal muscle tension, deteriorate limb activity, and affect the normal development of the fetus.

Patients with hypertension and coronary heart disease: caffeine can increase hypertension, so patients with hypertension and coronary heart disease should not drink coffee.

Patients with digestive tract ulcer: coffee can increase the secretion of digestive juice such as gastric acid, aggravate the stimulation of gastric mucosa, and affect the condition of digestive tract ulcer.

Calcium deficiency and the elderly: caffeine will increase the content of calcium in urine excretion and prevent the absorption of calcium, especially the elderly drinking coffee will make the phenomenon of calcium deficiency more serious, accelerate the speed of osteoporosis so it is not suitable to drink.