Lump in armpit

21 male I was working most of the morning then had an itch in my armpit and went to scratch It when I did it hurt like I poked a bruise apon further investigation it's about  the size of a pea and hurts when touched like a bruise I figure it's a swollen lymph node. Was looking into what it was and read that if you massage it it should help and so I tried and it seemed to go down and hurt less but it returns to it's original size and begins to hurt again
Should I be worried?

[Life360]

Hi Maaa.
Very well could be a node and also an ingrown hair. I would not rub it but go have it checked out. If its a node then you could have an infection of some type. Nodes are a filter and if it is the node, it hurting is a good sign.
Please have it checked out. If its a node, your body is trying to tell you something.
Dave