This might mean rotating your ankles, or getting up for a quick walk up and down the aisles. The risk also applies to other forms of travel, such as coach or bus travel where you stay seated for hours at the time. If you suffer from poor circulation, try wearing some good hosiery to encourage circulation. However it is important that you do not wear clothing that will cause a restriction of circulation. This can happen with pop soxs worn just under the knees, or socks which are tight around the ankles.
Loose clothing is essential on a long flight.
Allow room for expansion with loose fitting clothing. It is a well-documented fact that too much alcohol, tea and coffee on flights causes dehydration. Also bear in mind that air in a plane is very dry and the temperature warmer that we might normally have it at home. It is therefore very important to remain hydrated during a long flight by drinking plenty of water and fruit juices. Please discuss your travel health requirements with your regular GP or practice nurse.