Yes, allergies can lead to anemia. An allergic reaction can cause inflammation in the body, which can lead to the destruction of red blood cells. Red blood cells are responsible for carrying oxygen throughout the body, and when they are destroyed, the body does not receive enough oxygen. This can lead to anemia, a condition in which the body does not have enough healthy red blood cells to carry oxygen throughout the body. Allergies can also cause digestive problems such as constipation or diarrhea, which can cause a loss of iron in the body. Iron is essential for the creation of healthy red blood cells, and when it is lost, it can lead to anemia. Therefore, allergies can indeed lead to anemia.