Inflation of prices is a weasel phrase of the left. There is no such thing as "Inflation". It is deflation of the amount of debt the Federal Reserve note represents. Our currency is based on exchange of debts. A Fed Note was declared "Legal Tender" to be exchanged for the debt you owe for groceries or any other debt.
The government keeps issuing new debt notes to cover their spending. These new notes move the debt from your notes to the new ones.
So prices rise to EQUALIZE with the lesser value of the debt notes you hold.

E.g. let's say the price is 100 cents to buy an item. The government doubles the amount of notes so your "Dollar" note now represents only 50 cents of debt. The price is now two 50 cents "Dollar" Notes. Get it?

Why didn't we see so much inflation before? As production gets better prices fall. This allows equalization to the reduction of the debt in your notes without raising prices to equalize. Wages also rise but always much more slowly than debt stealing by the government. If the government borrows to much and production does not get better in pace to the falling prices and wage increases we get price increases.