Hi. Greetings. Yes, poor diet, increased blood loss, worm infestation etc could cause iron deficiency which further causes hair fall. Also environmental factors could cause you to lose hair further. You'll need to get hemoglobin , mcv, mch, serum iron and
ferritin levels done. You'll probably need treatment with oral iron and multivitamin supplements and even hair care lotions or serums and thus u must see a dermatologist. Have a good balanced nutritious diet. Hope this helps. Let me know if you need any further assistance in this regard. Warm regards.