A small, painful lump is often a benign condition, such as a harmless cyst, a minor skin infection, or a clogged gland. Pain is actually reassuring, as serious conditions are typically painless. For temporary relief, you can apply a warm compress and take over-the-counter pain relievers like ibuprofen or acetaminophen. Please do not squeeze or try to pop it. You likely do not need an MRI. A doctor can usually diagnose the lump with a simple physical exam. If imaging is necessary, a quick and simple ultrasound is typically the first choice. Please visit a primary care doctor for an accurate diagnosis and appropriate treatment.