Is it natural for a 12 year old girl to have bumps under her armpits?

Yes, it's natural for a 12-year-old girl to have bumps under her armpits, as this can be a normal part of puberty. These bumps may be due to the development of hair follicles, sweat glands, or lymph nodes, and are often harmless. However, if there are concerns about pain, swelling, or other symptoms, it's a good idea to consult a healthcare professional for advice.