May be due iron tonic. Very effective treatment is available in homoeopathy for your low hemoglobin problem. Homeopathic treatment is painless and safe. No side effects. You need comprehensive treatment and it takes some time. Please start taking homeopathic medicine, preliminary dose arsenicum album 200-once daily in the morning for 5 days. Book online appointment/consultation with me (commencing from text consult rs 149, audio/phone-rs 300 and video rs 400) for further more comprehensive prescription and treatment.