The limits to this vital sign, however, consist in understanding and knowing the different types of thermometers. Many aspects can influence temperature, such as exercise, age, stress, climate and surrounding environment. It is important to ensure that the patient is relaxed and has not performed any strenuous activity shortly before being evaluated (Berman, 2015). For a healthy adult, normal body temperature should be around 37°C. All of this is considered a fever (Martha Keene Elkin, 2007). However, as with other vital signs, everyone is different and someone may have a slightly higher or lower temperature, which is normal for them. There are many different types of thermometers. There are oral, rectal, chemical, tympanic, and temporal artery thermometers and many others (Berman, 2015). Different thermometers are used depending on the person. Aspects such as being a child, not being able to move, sleeping while having a temperature taken can influence the type of thermometer a healthcare provider uses. For example, if a patient is sleeping then it is very invasive to use an oral thermometer because you would have to open their mouth and then if they woke up they would feel very violated. My concern with measuring temperature is which thermometer to use or if I can use any at all. The hard part was finding out if there were special circumstances to use certain ones