The plague was a devastating pandemic that killed millions of people in the Middle Ages. It was caused by the bacterium Yersinia pestis, which was carried by fleas on rats.

Bloodletting was a common treatment for many illnesses in the Middle Ages, including the plague. It was believed that removing bad blood from the body would help to cure the disease.

Trachoma is a bacterial infection of the eye that can lead to blindness. It was very common in the Middle Ages, especially in poor and unsanitary conditions.

There was no effective treatment for blindness in the Middle Ages. However, some herbal remedies were believed to help improve vision.

Puerperal fever is a bacterial infection of the uterus that can occur after childbirth. It was a major cause of death in childbirth in the Middle Ages.

Bloodletting was a common treatment for many illnesses in the Middle Ages, including puerperal fever. It was believed that removing bad blood from the body would help to cure the disease.

Diarrhea was a major cause of infant mortality in the Middle Ages. It was often caused by contaminated food or water.

There was no effective treatment for diarrhea in the Middle Ages. However, some herbal remedies were believed to help relieve symptoms.

Sugar was a major cause of tooth decay in the Middle Ages. It was often added to food and drinks, and it was also used to make candy.

The most common treatment for tooth decay in the Middle Ages was to pull the tooth. This was because there were no effective ways to fill or repair teeth.

Stress was a major cause of headaches in the Middle Ages. People often lived in difficult and unsanitary conditions, and they were often exposed to violence and disease.

There was no effective treatment for headaches in the Middle Ages. However, some herbal remedies were believed to help relieve symptoms.

Poor hygiene was a major cause of skin infections in the Middle Ages. People often lived in crowded and unsanitary conditions, and they did not have access to clean water or soap.

There was no effective treatment for skin infections in the Middle Ages. However, some herbal remedies were believed to help relieve symptoms.

Demons were believed to be the cause of mental illness in the Middle Ages. People who were mentally ill were often thought to be possessed by demons, and they were often treated with exorcisms.