There are two basic reasons why inflation has been increasing: supply and demand. Starting with the latter, consumers have been on a spending spree after having spent a large proportion of time during 2020 and 2021 at home bingeing on Netflix.
The main reason for the current rise is due to the global price of energy. This has meant higher energy and transport bills for businesses, many of whom pass on the extra costs to their customers. Supply problems and higher shipping costs are also continuing to have an impact on businesses.