Incidence and characteristics of frozen shoulder following COVID-19 vaccine: A systematic review (pubmed.ncbi.nlm.nih.gov)

• Very low incidence of frozen shoulder post-COVID-19 vaccination (<0.1%).
• Temporal association: onset mostly 2–6 weeks after vaccination.
• Good recovery with conservative treatment.

"A systematic review examined frozen shoulder (adhesive capsulitis) occurrence after COVID-19 vaccination. Analysis of multiple studies showed low incidence but a temporal link to vaccination. Most cases developed within weeks of the first or second dose, with good recovery after conservative management. The review stresses vaccine benefits outweigh risks, but clinicians should recognize this potential side effect."