How to increase Hb levels in a 27-year-old female?

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Thank you for your query.

Low hemoglobin is also called anemia.

1. Grade 1 anemia: Hemoglobin less than normal for age and gender up to 9.9 g/dL. This is mild anemia. No investigation is needed. Just improve diet, give hematinics. Rule out renal disease, liver disease, thyroid disease, thalassemia minor, or any drug-induced cause.
2. Grade 2 anemia: Hemoglobin ranges from 8.9 to 9.8 g/dL. This is moderate anemia. Investigate causes that might be combined with nutritional deficiency or other above-mentioned causes. No blood transfusion is needed at this level.
3. Grade 3 anemia: Hemoglobin range from 7.9 to 8.8 g/dL. This is moderately severe anemia. Causes may be hemolysis, acute or chronic blood loss, along with the above-mentioned causes. No need for transfusion at this level unless a surgical emergency is there. Treat the cause.
4. Grade 4 anemia: Hemoglobin ranges from 6.9 to 7.8 g/dL. This is severe anemia. However, no transfusion is needed even at this level unless there is some surgical emergency. Causes include thalassemia intermedia or major, G6PD deficiency, hereditary spherocytosis, and above mentioned ones.
5. Grade 5 anemia: Hemoglobin level 5.9 to 6.8 g/dL. This is very severe anemia. A blood transfusion may be needed according to the cause.

Critically low hemoglobin or grade 6 anemia: Hemoglobin level less than 5 g/dL. Transfusion is needed regardless of the cause. Consider thalassemia major, and aplastic anemia.

I hope this has helped you. Thank you.