Drinking too much coffee may cause headaches, irritability, muscle tension and nervousness. Coffee contains a lot of caffeine, which will cause people's nervous excitement after drinking, and may affect sleep within four hours after drinking coffee.

Drinking too much coffee still has a certain impact on the human body. Drinking a cup of coffee every day may lead to female infertility. Some experts have investigated many women who have the habit of drinking coffee and found that some women who often drink coffee have some abnormal fertility. Of course, this is only a sampling inspection, not absolute.

Coffee may also cause myocardial infarction. Studies have shown that drinking five or more cups of coffee a day may increase the risk of myocardial infarction in women by 70%.

Coffee may also lead to osteoporosis. Studies have shown that women who drink two cups of coffee for a long time every day will have higher cervical vertebra density with the increase of coffee drinking time and frequency.

Coffee may also cause fetal malformation. Drinking two to twenty-four cups of high-concentration coffee every day may cause fetal malformation.

In addition, coffee may also cause pregnancy-induced hypertension. Pregnancy-induced hypertension syndrome is a unique disease of pregnant women, which may lead to hypertension if not treated in time.