Eligibility participants who are allocated to the intervention group will be required to find a time to monitor and record their behavior of hand-to-face contacts, including the frequency and length (in second) of face-touching in any of the mucosal area (eyes, nose, mouth) and nonmucosal area (ears, cheeks, chin, neck, forehead, hair) during a 60-minute period. Then, they will receive the online mindfulness-based "STOP touching your face" program. Each participant will be required to practice this technique until they feel confident and natural. The systematic review showed the efficacy of single session of brief MBIs, the average length was 15 minutes, ranged from less than 5 to 25 min. Thus, the requirement practice time will be at least 15 minutes (excluding the time of reading the text and the first time of listening to the audio). Later (at least 1-hour interval), they will be asked to self-monitor and report their one-hour face-touching behavior again.

Participants who allocate to the control group will only receive information to thank them and encourage them to complete the study. They will receive "STOP touching your face" program after the end of this study. The repeat measurement of the face-touching behavior will be in at least 1-hour interval.

1. Remind yourself to STOP. Whatever you are doing in this moment (e.g. touching your month, pinching your nose, rubbing your eyes, resting your chin on your hands), pause for a minute. 2. Take a deep breath. This reconnects you with your body. Pay attention to your breathing and just allow yourself to continue to breathe normally and naturally. 3. Observe what is happening for you in this moment-including thoughts, feelings, and emotions (e.g. feel distracted, anxious or nervous?). What do you notice in your body (e.g. feel itchy or tingling on any part of your face)? You can be aware of anything: posture, sensations, tension in your body, or, once again, your breath. You might notice the sound around you. You might even notice your thoughts or emotions. 4. Proceed with whatever you were doing before you came to a STOP or something that you want to do in the moment (e.g. proceed with touching your face, or stop face-touching and take an alternative behavior).

This will be calculated as the total times of face-touching (including the eyes, nose, mouth, ears, cheeks, chin, neck, forehead, hair) during a 60-minute period before the intervention minus the total times of face-touching after the intervention.

This will be calculated as the percentage of participants touching their faces (including any of the following areas: the eyes, nose, mouth, ears, cheeks, chin, neck, forehead, hair) during a 60-minute period before the intervention minus the percentage of participants touching their faces after the intervention.