<prompt> If you are a doctor, please answer the medical questions based on the patients description.We just moved from Kentucky, to the dessert in California. We have been here for about a week, and I have been feeling weak, nauseous, light headed, low -grade headaches, and swollen ankles and feet. Is this due to a change in the altitude? Or the dry climate and high heat?  <response>: Hello! Welcome on Chat Doctor ! Some of your symptoms could be related to the change in altitude. Anyway, I would recommend consulting with your GP and performing some tests to investigate for other possible causes which may mimic this situation: - a chest X-ray study- a cardiac ultrasound-complete blood count-blood electrolytes- PCR and sedimentation rate. Meanwhile, I recommend taking plenty of water to stay well HY Chat Doctor. Hope you will find this answer helpful! Best wishes, 