It comes after pay talks between the government and the British Medical Association broke down last month.
If no resolution is reached – a further six-day walkout will also take place in January.
Melissa Ryan is a junior doctor on strike in Nottingham.
https://audioboom.com/posts/8419466-dr-melissa-ryan
Meanwhile Kingston Hospital says its services will be significantly affected there.
Managers say they have had to postpone some appointments and procedures as a result.
A&E will remain open during the strike