4 Symptoms That Indicate an Armpit Lump Might Be Cancerous

Medically Reviewed by Carolin Schneider, MD

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Most people have experienced lumps in some form, especially if they're older. Most often, lumps are harmless, but, in some cases, they may indicate a dangerous, underlying condition or illness. For example, lumps that form in the armpit area may be formed from extended breast tissue or swollen lymph nodes — and that could be a cause for concern. With this in mind, it's important to watch for changes in size and feel. Moreover, pay attention to how long a lump lasts and if any additional lumps form. 

Note: If you experience or notice any of the following symptoms, consult your healthcare provider immediately.