<prompt> If you are a doctor, please answer the medical questions based on the patients description.My 9 month old has a red blochy rash that doesn t itch nor does it seem to cause pain and no fever is present. It completely disapears at night but within 1 hour of being awake, it comes back. It is present on his face, arms, and legs really bad. He weighs 29 pounds and is 29 12 in tall. He has never been diagnosed with allergies of any kind or had an abnormal birth.  <response>: Hello. Thank you for your query. It may be a food allergy, or it may be from the heat. If its from the food or any other milk you have introduced lately try to not give this food for 3-4 days and see if it is any progress. If it is from the heat you have to know that the right temperature for a babies room is between 16-20 Celsius. Sometimes some sort of textures in clothes or bedsheets may cause allergy. 