well my best suggestion is to seek medical attention. under most circumstances it's not a good idea to pop any lump or bump that comes up under the skin particularly if it doesn't have a visible "head. " it's especially not a good idea to use a thumbtack to pop skin lumps. lancing boils and other skin lesions is better left to professionals. wihle you're waiting for an appointment with your primary care provider keep the hole clean by washing with plain soap and rinsing with water. if you're not allergic to any medications you also can put an antibiotic ointment (such as neosporin or generic "triple antibiotic ointment") on the hole to help guard against infection. if you develop a fever; hot red swelling at the puncture site; pain that gets worse instead of better; or feeling like you're coming down with the flu you should go to an urgent care facility as these can be signs of an infection. i wish you the best of luck with this!
i had a cyst (? ) on my pubic area so i tried to pop it with a thumb tack and now there is a hole. what should i do? . i'm not sure if it was a cyst but one morning i woke up with a grape sized lump under my skin so i pushed it and it felt like a tire deflated and it popped under the skin.