My granddaughters temp has been running low for 2 days now. We took it the first night this happened and it read 93. This was under her arm. She is 4 and was diagnosed with a heart murmur a month ago. Could this have something to do with this. She mostly gets this way at night when she has been sleeping awhile.
Hi, thank you for posting on Chat Doctor, Low temperature in a healthy child is a bit unusual as hypothermia usually occurs in a child with shock or undue coldness in external environment. Heart murmurs are very common in child Chat Doctor.  Therefore, heart murmur cannot explain low body temperature. Are you sure about temperature measurement technique or the thermometer? If still low temperature it may be due to hypothalamus temperature regulation problem which is extremely rare in otherwise healthy child. Hope the answer is helpful. Thank you.