What is this and should I be concerned?

A small, pimple like bump appeared on my arm. It began to get bigger and bigger and more irritating so I got concerned and thought Id try to pop it. W

A small, pimple like bump appeared on my arm. It began to get bigger and bigger and more irritating so I got concerned and thought I'd try to pop it. When I popped it, it sent a pain up and down my entire arm and it bleed a lot. A yellowish white puss-like substance appeared after the bleeding stopped. What is this and should I be concerned?

or:A small, pimple like bump appeared on my arm. It began to get bigger and bigger and more irritating so I got concerned and thought I'd try to pop it. When I popped it, it sent a pain up and down my entire arm and it bleed a lot. A yellowish white puss-like substance appeared after the bleeding stopped. What is this and should I be concerned?


or:It could be a ingrown hair or a sore that got infected nine times out of 10 its a ingrown hair that really got badley irritated if it doesn't get better make a dr appointment.

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