<s>[INST] constanst tireness weekness in my bones , no energy very short of breath, with any bit of exertion . its not my heart as i had that test done,and there are no blockages,and as i have to wait until sept for the results at the out clinic i am worried as my problem seems to be getting worse . only yesterday i was doing the lawn and while pairing along the edge with the spade i went faint a rainbow and bright lights appeared in my eyes for a few seconds and i had to grab hold of the pier to stop from falling what might be the cause ? sorry i cannot afford the cost. but thanks all the same [/INST] Hi, Welcome to Chat Doctor .com I am Chat Doctor. Mariano Into Bruno Mascaras, and I am here to help you. I have read your question with care and understand your concerns.  Anemia (low Hemoglobin in Blood) will reduce the oxygen carrying capacity of the blood. Hence, Less Oxygen will be delivered to your tissues. This can cause weakness with shortness of Blood Problems in Lungs can cause weakness with shortness of breathes are all easily treatable Hope you found the answer helpful. If you need any clarification / have doubts / have additional questions / have follow-up questions, then please do not hesitate in asking again. I will be happy to answer your questions. Best Wishes for Speedy Recovery Let me know if I can assist you further. Take care. </s>