It can be used under the arm, orally or rectally, depending on whether or not it has a flexible probe. It is the baby thermometer par excellence, both for its speed (20/30 seconds) and for the various colors available which make it more captivating and playful. – the infrared thermometer: it can be auricular or forehead, at a distance or by contact; the auricular one is inserted in the ear, while the frontal one can be by contact or at a distance. In this second case it works by means of an extremely rapid (very few seconds) and precise optical pointer of light beams; not necessarily having to come into contact with the body, makes these thermometers useful for measuring the temperature of children or babies even while they are sleeping. Warning: incorrect interpretation of the instructions can lead to a temperature measurement error margin of as much as 1 degree. The questions Therefore, when it comes to thermometers for children and to answer the most frequently asked questions about thermometers and give advice for mothers, the digital and the infrared ones are the most recommended for practicality, versatility of use, precision, safety and speed of temperature detection .