The best baby thermometers are fast, user-friendly and easy to clean. Here are our top picks for 2025 from brands like Vicks, ...

Experiencing a fever is a common sign of many illnesses, from the flu to COVID-19. Regularly checking your body temperature is crucial to evaluate your health ...

Technically, yes. “You can feel feverish without having a temperature, but you cannot clinically have a fever without a temperature above 100.4 degrees Fahrenheit by mouth,” says Eric Ascher, D.O., ...

Armpit temperature: A digital (oral) thermometer can be used in your armpit, ... Infants up to 3 months with a temperature of 100.4 or higher. Fever in infants younger than 3 months could indicate ...

As for the borderline conditions—a temperature of, say, 101 or 99 or 100.4—your hand won’t name his fever with as much precision as a good thermometer would.

The human body typically maintains a temperature between 97°F (36.1°C) and 99°F (37.2°C), with readings of 100.4°F (38°C) or higher qualifying as a fever.

If you suspect that you have a fever but don’t have a thermometer around (and don’t feel like investing in one), doctors say there are a few signs of a fever to look out for: You feel off .