Failure to thrive is known as ill thrift to some.
The term "failure to thrive" has been used in different ways, as there is no objective standard or universally accepted definition for when to diagnose FTT
 Additional, medical conditions including parasite infections, urinary tract infections, other fever-inducing infections, asthma, hyperthyroidism and congenital heart disease may raise energy needs of the body and cause greater difficulty taking in sufficient calories to meet the higher caloric demands, leading to FTT

