Anemia is a condition in which their is little or no red blood cells in the blood. A person with anemia has thin blood. This happens when blood is lost or destroyed faster than the body can replace it. Blood loss from Large wounds, bleeding ulcers or dysentery can cause anemia. So can the monthly bleeding (menstrual period) of women, if they do not eat the foods that their body needs.
A diet lacking meat, dark green leafy vegetables and other foods rich in iron can cause anemia or make it worse.
In children, anemia can come from not eating foods rich in iron. Common causes of severe anemia in children are hookworm infection, chronic diarrhea and dysentery. Malaria, which destroys red blood cells, can also cause anemia.

Other causes of anemia include:
• Accident
• Surgery
• Fibrosis
• Ulcer
• Endometriosis


The Signs of Anemia are:
• Pale skin
• Pale inside of eyelids
• Pale gums
• White fingernails
• weakness and fatigue
In severe anemia;
• Face and feet may be swollen
• Rapid heartbeat
• Shortness of breath

Treatment and prevention of Anemia:
Treatment of anemia varies depending on the underlying cause.
• Eat foods rich in iron: Meat, fish, chicken and eggs are high in iron. Liver is especially high. Dark green leafy vegetables, beans, peas and lentils also contain iron in them.
• If foods rich in iron are hard to get, or if the anemia is severe, the person should take iron (Ferrous Sulfate pills). This is especially important for pregnant women who are anemic. Ferrous sulfate should be given by mouth and not injected.
• If the anemia is caused by dysentery (diarrhea with blood), hookworm, or other disease, do not hesitate to meet or call a doctor or physician.

Many women are anemic because they do not eat enough food rich in iron to replace the blood they lose during periods or after childbirth. It is very important that women eat beans during pregnancy.

Source: https://myhealthetic.com/2020/01/15/a-person-with-anemia-has-thin-blood-this-happens-when-blood-is-lost-or-destroyed-faster-than-the-body-can-replace-it/

Thanks op... really informative