<s>[INST] what are the long term effects of low hemoglobin?  I was admitted into the hospital a week ago with hemoglobin level of under 7.  I was given blood transfussions & iron via IV and was discharged with hemoglobin level of 10.  I am concerned of the effects in the long run if I dont increase my hemoblobin levels. [/INST] Thanks for asking to Chat Doctor. I understand your concern.In my opinion, bodys compensatory mechanisms come into play, when the hemoglobin levels are low, and you feel generally only symptoms like palpitations, weakness,headache, shortness of breath etc.However, If anemia(low hemoglobin) left untreated, the compensatory mechanisms start to fail due to exhaustion and any other conditions, which takes years, serious problems like multiorgan failure can occur(for heart failure due to cardiomyopathy). Hope this information helps you. Take care. </s>