Do wearing bra of wrong size gives shoulder pain?
There are two main scenarios where the wrong bra gives a shoulder pain.
Improper sizing- Make sure you are wearing the right bra. Use a bra size calculator or size chart before buying a bra.
Digging straps-If even after correcting your size, you straps hurt, then adjust the metal sliders in the shoulder straps until they fit properly without chafing your skin.
Tight straps might lead to posture problems and skin rashes. It is definitely not a healthy sign and demands immediate attention.