<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi. I have been having health concern for awhile now. Been to a doctor twice. No answers. I feel dizzy lightheaded extremely irritated all the time.. chest tight...Very thin and losing weight always..White nailbeds instead of pink,, nails are so weak and brittle and peeling.. now I have a pinprick feeling in my legs that started last night..feels like tiny needles.. and a sensation of goosebumps.  <response>: Respected user, thanks for using Chat Doctor.come evaluated your query thoroughly. This is in relation with systemic problem which may be - low hemoglobin - deficiency of vitamins, minerals, trace elements, proteins, B complexes - blood sugar or thyroid related alterations - lung pathology - cardiac conditions - others Need extensive work up with study of all reports done till date, what is lacking which direction to proceed further to fix the issue Hope this clears your queryWelcome for further assistanceRegards. 