What is causing my puffy nipples and lumps in my chest at 17, and will it go away on its own?

What you’re describing sounds like it could be gynecomastia, which is quite common among adolescent males due to hormonal changes during puberty. It involves the growth of glandular breast tissue and might cause a firm or rubbery lump under the nipple area. These lumps can be tender, especially if squeezed. On the other hand, pseudogynecomastia involves fatty tissue rather than glandular, and it’s often associated with being overweight. The good news is that gynecomastia during puberty is usually due to the imbalance between testosterone and estrogen, and it often resolves on its own within a couple years, as hormone levels begin to stabilize. First, though, it’s important to rule out other contributing factors, so consider seeing a healthcare provider to confirm the diagnosis. They might recommend blood tests or imaging to evaluate your hormone levels or check for other underlying conditions. In most cases, if it’s pubertal gynecomastia, no treatment is needed beyond reassurance and observation, provided it isn’t causing you significant distress or affecting your daily life. If the gynecomastia is persistent and troublesome, options such as medication or surgery might be discussed, albeit rarely needed for teenagers. If you notice any rapid growth, significant pain, or asymmetry, or if you have other symptoms like unintended weight gain or loss, seek medical evaluation promptly, as these can be red flags for other conditions. Overall, maintaining a healthy lifestyle with regular exercise and a balanced diet can be beneficial both for physical health and self-esteem during this growth phase. Regardless, it’s worth discussing your concerns with a doctor who can provide personalized advice suited to your specific situation and ensure no other health issues are at play.