Epsom salt is good. The medication will help. However if the core of this wasn't removed it can come back. If you do get them again, you can apply a warm moist compress to the area several times a day, as the heat will help draw them to a head to burst. Also there is a cream called Ichthammol, it's a drawing out suave. Just wash the area well with antibacterial soap, apply the cream and cover with a band-aid, doing this 2x a day. If you don't already, you may want to use an antibacterial soap all the time, such as Lever, which is good.
Don't ever try to pop them yourself or squeeze them, as this can cause further infection and cause the infection to go further. It's a bad location where they are, as sitting can cause your clothing to rub on that area as well. So try to wear form fitting clothing that will not rub your skin on that area. Do complete the antibiotics you were given and just see how that goes.
Best of luck, Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *ACCEPT* button and leave *POSITIVE* feedback.