I tried to aggressively pop a pimple but nothing came out and the next day the side of my jaw was swollen. how can i bring the swelling down?

Facial swelling: after trying to express the content of any skin lesion can lead to complications such as yours, a prompt evaluation and appropriate treatment is highly recommended at this time. A simple skin care regimen directed towards decreasing production of sebum/ oil, keeping the pores open and skin clean will always be helpful for future references. Take care.

Time for a visit: Your self treatment seems to have triggered a reaction that may signal an infection.You need to get in and have it evaluated before it gets worse.It may require antibiotic treatment.