Dwarf fat tailed Gecko

Question
Hi I hope you can help..We have a dwarf fat tailed Gecko which is my 6 year old's pet and today he seems to be having some problems. He has been shedding for the past couple of days and today he has been out during the day and has had his mouth wide open constantly. He doesn't seem to be in any discomfort and still allows us to hold him. I cant see any discolouration and his diet has been normal of late, eating his usual brown crickets. Is there any advice you could give as to why this is happening please?
Many thanks
Stuart

Answer
 Gaping ing reptiles usually means he feels too warm and opening his mouth will expel excess heat.  It is normal when he feels too warm but not hot enough to feel the need to move to a cooler area.  However, if the gaping is constant and his tank temperatures are with his species' normal range and even on his cool end, check his nasal passages for retained shed.