<s>[INST] 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 1/2 in tall. He has never been diagnosed with allergies of any kind or had an abnormal birth. [/INST] 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 these 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 baby's room is between 16-20 Celsius. Sometimes some sort of textures in clothes or bed sheets may cause allergy. </s>