Knot pain in my Left Pect muscle!

[LAclutch239]

I worked my chest out last wed, and friday I noticed when I flex my left pectoral muscle I feel this knot pain inbetween where my armpit and nipple meet. It's a pain I've never had before or felt, and it's not like my routine was any different then any other chest workout I've done. I'm really confused on this pain because it doesnt hurt whatsoever at rest or moderate use of my chest Ie: pushups (haven't lifted heavy since wed) but only when I flex. The pain has subsided very minimal since friday. There is no bruising around my chest btw.

[Jevastus]

I worked my chest out last wed, and friday I noticed when I flex my left pectoral muscle I feel this knot pain inbetween where my armpit and nipple meet. It's a pain I've never had before or felt, and it's not like my routine was any different then any other chest workout I've done. I'm really confused on this pain because it doesnt hurt whatsoever at rest or moderate use of my chest Ie: pushups (haven't lifted heavy since wed) but only when I flex. The pain has subsided very minimal since friday. There is no bruising around my chest btw.

When you squeeze it you mean?