Tiny lump for 2 years

I’ve had a tiny lump in my armpit which is sore if I press it for 2 years. It was November 2024 that it was there seemingly overnight, but while I was weaning breastfeeding… and by January the following year I was pregnant and though the lump was there I hesitated getting it checked because I didn’t want to do anything that could hurt my baby. 
now I’m weaning the child who was born 2025, and I notice the lump again. I’m wondering if this is kind of normal for breast tissue fluctuating while breastfeeding or if it’s something I should be concerned about. At some point it felt softer but now it’s back to this harder lump, about a tiny pebble size. It’s quite deep and it only hurts if I sort of pinch it. 

  • Hi there and thanks for the post

    It was moved to the ask the nurses section of cancer chat to answer.

    Lumps and bumps in the body are common and in most cases won't be caused by anything as serious as a cancer.

    Lumps in the armpit in particular can be caused by ingrowing hairs, cysts and sometimes lymph nodes that are raised during or after an infection.

    If lumps persist, grow larger or other symptoms appear they are best to be checked out by a GP just to be on the safe side. If a doctor thinks further tests are needed to find out more they can arrange these as well.

    As you have had this lump for a couple of years without other changes it is unlikely to be anything serious but for your own peace of mind we would suggest making an appointment with your doctor.

    I hope this helps. Do get back in touch or give us a call on 0808 800 4040 if you want to talk it through over the phone. The nurses are here weekdays 9-5.

    Take care

    Naomi