Giant Cyst popped and explodes from arm

Wash your hands. This will prevent bacteria from spreading to your face. Wash thoroughly, especially underneath the nails, and use plenty of soap and warm water. You’ll want to avoid touching the pimple with your finger nails, but just in case you do, having them clean will reduce the likelihood of irritation and infection.
Consider using a fingernail brush to get dirt out from under your fingernails.

Cover your hands. Put on disposable gloves just before you’re ready to pop the pimple. Not only will this put a barrier between any remaining bacteria on your fingers (and in your fingernails) and your skin, but it will also prevent the sharp edges of your nails from impacting the pimple.
If you don’t have disposable gloves, you can cover your fingers with clean tissues.

Clean the skin surrounding the pimple with a face cleanser or rubbing alcohol. Apply cleanser to a cotton ball and spread it. When you pop the pimple, you’ll be opening the skin, creating a way for bacteria to enter. The pimple will heal faster if you don’t give bacteria a chance to settle in and create a new or worse infection.
Don’t scrub the area too hard, or you’ll irritate it further. Gently cleanse the area, rinse it with warm water, and pat it dry with a towel.

Popping a Pimple with a Pin

Sterilize a pin with fire. Use a match or lighter to heat up and sterilize the pin. Expose every bit of the pin to fire for several seconds to kill off any bacteria.

Allow the pin to cool. Give the pin at least a minute to cool down. It should not be painfully hot when you use it to pop your pimple.

Sterilize everything with rubbing alcohol. Apply rubbing alcohol to the pin, to your hands, and to the zit. Be sure that everything involved in the procedure is sanitized with rubbing alcohol.

Hold the pin parallel to your face. You do not want to point the pin toward your face. Instead, you should hold it along your face, so that when you poke your pimple it won’t penetrate anything but the very tip of the pimple.

Pierce the white tip of the zit. Do not touch anything but the white part of the zit. Penetrating the red part of the pimple will cause scarring. Instead, run the pin through the very tip of the pimple, so that it goes through one end and out the other.

Pull up with the pin. The pin should have penetrated the length of the white tip. Pull the pin out, away from your face, so that it ruptures the white tip when you remove the pin from the pimple.

Gently squeeze around the white top. Do not squeeze the white top itself. Instead, squeeze the perimeter of the pimple so that it pushes out the pus. Consider squeezing with a cotton swab to avoid doing additional damage to the skin.

Apply alcohol to the pimple. Use a cotton swab to rub the area down with alcohol and clean up bacteria. Apply a small amount of bacitracin ointment to the area.