No data was given about the dimensions and the number of the pimples. It is hard to say what the pimples are without seeing them or without additional description.
You might want to visit a dermatologist for visual inspection.
If the pimples and the surrounding skin are reddish and hot, then you might want to use some over-the-counter anti-inflammatory creams. If there is liquid coming out of the pimples, you might want to have a swab from the pimples with antibiogram which would determine exactly the possible bacterial cause and the most useful antibiotic.