[Michie]

Hi Hluio, it's possible that the chair you are using is not ergonomically designed for your built.

Suggestions:

1. Find a right chair for you - a wrong chair can impede blood flow or when your sitting, it is actually pressing too much on your Sciatica Nerve. When you pressed on your Sciatica Nerve for a long time, you generate that tingling sensation that you are mentioning.

2. Stand up every hour (Use Apple Watch Reminder or anything that reminds you to stand up every hour) - this has the same concept of you sitting in a plane for a very long time. The circulation of blood is either being impede by your sitting position or it is not circulating properly due to sitting. As some would suggest, pump your feet, pump the blood from your foot up.

3. Use a standing desk

4. Ask for a recommendation of a Physical Therapist or go to a Doctor that specializes in Rehab Medicine. They know what to do. :)