Writing instrument

A computer-implemented method for measuring recovery of a finger skin temperature of a writing instrument's user, comprising:

• measuring a first finger skin temperature of at least one user's finger contacting a grip area of the writing instrument during a writing session with the writing instrument;
• cooling the at least one finger contacting the grip area with a cooling element and for a cooling duration;
• measuring a second finger skin temperature after lapse of the cooling duration;
• calculating the skin temperature reduction;
• measuring a series of finger temperature measurements after lapse of the cooling duration;
• calculating a temperature recovery rate based on the series of finger temperature measurements;
• comparing the skin temperature reduction and the temperature recovery rate to historical data from the same user or to reference data from a group of users;
• and
• providing an indication to the user in case that the skin temperature reduction and/or the temperature recovery rate are abnormal as compared to the historical data and/or to the reference data.