Causes for anemia

Krishna: Undoubtedly your wife is anemic. But just taking food rich in iron might not automatically cure her! Yes, you heard it right. Because there are various reasons why people become anemic.
A slightly low hemoglobin count isn't always a sign of illness — it can be normal for some people. Women with menstrual periods and pregnant women commonly have low hemoglobin counts.

So without sounding an alarm, let me list what those reasons are.
Anemia can occur if
1.Your body produces fewer red blood cells than usual
2. Your body destroys red blood cells faster than they can be produced
3. You have blood loss
Diseases and conditions that cause your body to produce fewer red blood cells than normal include:
Aplastic anemia, cancer, certain medications, such as antiretroviral drugs for HIV infection and chemotherapy drugs for cancer and other conditions,chronic kidney disease, cirrhosis
Hodgkin's lymphoma (Hodgkin's disease), hypothyroidism (underactive thyroid), inflammatory bowel disease (IBD), iron deficiency anemia, lead poisoning, leukemia, multiple myeloma
myelodysplastic syndromes, Non-Hodgkin's lymphoma, rheumatoid arthritis, and vitamin deficiency anemia.
Diseases and conditions that cause your body to destroy red blood cells faster than they can be made include:
Enlarged spleen (splenomegaly), hemolysis, porphyria, sickle cell anemia, thalassemia
A low hemoglobin count can also be due to blood loss, which can occur because of
bleeding in your digestive tract, such as from ulcers, cancers or hemorrhoids
frequent blood donation
menorrhagia (heavy menstrual bleeding) (heavy menstrual bleeding-although even normal menstrual bleeding may cause a slightly low hemoglobin count)

So go for testing and find out the reason. Then take remedial action.
It is not good to take advice from people on the net. Consult a good qualified medical doctor.