An armpit lump is an enlargement or a swollen bump that develops where the underside of your arm joins your shoulder. It usually develops beneath the skin. An armpit lump can vary in size ...

You could end up with a lump in your armpit from lymph node swelling if a scratch or bite occurs on your arm. Cysts can appear in your armpit and cause lumps after you have shaved. You can also ...

As before, a lump on the neck or under the arm should be treated as suspicious unless there’s been trauma. Even if lumps in these areas don’t hurt, you should still seek to have them assessed ...