A fever detecting wrist band device comprises a flexible band and a fever detection device attached to the flexible band. The fever detection device comprises a thermochromic liquid crystal (TLC) material, which can change colors corresponding to a set of temperature ranges, encased in a transparent casing. The transparent casing has a thin bottom section to allow the TLC material to gather body heat when the wrist band is worn by a user and the bottom section comes in contact with the skin of the user. The transparent casing also insulates the TLC material from all sides which are not in contact with the skin of the user so that surrounding temperature of a user does not affect the color change of the TLC material. When the user wears the fever detecting wrist band device, the TLC material might change color indicating a higher body temperature of the user which in turn could indicate that either the user has a fever or the user might have a fever soon if not treated immediately.
