Members of the British Medical Association (BMA) began to leave around 7:00 because NHS England had issued a warning that regular hospital services would be severely disrupted.
The union stated that it was acting because there had been no recent, realistic offer to end the walkout, which had occurred in February.
However, the current action’s timing in the week preceding a general election has drawn criticism from NHS executives.
According to the NHS Confederation, it was a difficult pill to take to go on strike during the election season when no political party could settle the disagreement.
In order to compensate for what it claims are 15 years of salary increases below inflation, it has requested a 35% increase.
In the most recent fiscal year, junior physicians saw their compensation increase by an average of about 9%.
Last year, the BMA left negotiations wherein an additional 3% wage increase was being proposed.
Two-thirds of junior doctors in the NHS are members of the BMA, making up over half of the medical workforce. As a result, NHS England is warning of substantial disruption, noting that the health service is already under additional strain this week owing to it.