The difference between a boil and a pimple might be that the former doesn’t have a ’head’, while a pimple does.
This is a central point where a person may even be tempted to pop the pimple. Of course, this latter action is not at all recommended, not even for regular pimples. If a person is at risk of contracting MRSA, this action should especially be avoided.
Overall, if a pimple seems stubborn, is leaking pus or other fluids, seems to be swollen and is painful to touch, there’s probably a risk of MRSA. This infection, along with staph infection, should be the first two considerations to come to mind, especially if you’ve been exposed to a risky environment.
Such environments could include locker rooms, gyms, exercise mats, and using other people’s belongings such as their cell phones. Shared towels, gym equipment, etc, can lead to a spread of the infection.