A boil - or abscess
in medical terminology - is a superficial skin infection that has formed a pocket of pus trapped under then skin. It is a problem that affects many people, and should be evaluated by a physician. When you see a doctor
about this abscess, you can consider discussing the following information.
An abscess is caused by bacteria commonly found on the skin of people, such as staphylococcus and streptococcus. The abscess itself is not contagious, as it is a walled-off collection of pus, but the bacteria that lead to abscesses can be spread from person to person by physical contact, such as sex. If your boil is actively draining pus, it is even more likely to spread bacteria to another person. Abscess-causing strains of bacteria that are resistant to particular antibiotics, such as methicillin-resistant staphylococcus aureus (MRSA), are also spread through physical contact.
As sexual contact with an active boil could spread abscess-causing bacteria, it is probably best to avoid it until you can be evaluated by a doctor. You may need treatment for this disease process on your right leg, depending on its severity, so I recommend that you promptly make an appointment to see your primary care doctor
or go to be evaluated in an urgent care setting.