My 3 year old daughter feels cool to the touch but round her neck is warm she is sweating. she has biliary atresia. shes also had tummy ache?

Needs medical eval.: Biliary atresia is a relatively uncommon condition, and it would be important to see if she has fever, yellow skin and eyes, and whether she is vomiting. Seeing a pediatrician or pediatric surgeon would be the best course.

Possible infection: If she has biliary atresia, she likely had a kasai procedure - connecting her intestine to her liver to drain bile. She has risk for biliary infection with this connection and can develop cholangitis - infection of the biliary system. This can be a somewhat chronic condition and she may intermittently have infection which will lead to occasional fevers and sweating. This should be monitored by md.