Yes, anemia can go away quickly if it is caused by a lack of iron or other nutrient deficiencies. Iron-deficiency anemia, the most common type, can be treated with changes in diet, vitamins and supplements, and in some cases, iron injections.
If the anemia is caused by a severe infection, such as a bacterial or viral infection, it can also be treated with antibiotics. Some people may also need a blood transfusion to replace lost red blood cells.
In addition, some underlying medical conditions, such as kidney or liver disease, can cause anemia. Treatment of the underlying medical condition can help the anemia resolve.
If the anemia is caused by heavy menstrual bleeding or bleeding from another source, such as a peptic ulcer, treatment of the underlying cause can also help the anemia resolve.
Finally, if the anemia is caused by a chronic disease such as cancer, it may not be possible to completely cure the anemia. In these cases, treatment of the underlying condition can help manage the anemia symptoms and slow the progression of the anemia.
In general, anemia caused by nutrient deficiencies or infections can be treated quickly and effectively, while anemia caused by chronic diseases or bleeding may take longer to resolve.