Sometimes due to incorrect lifting techniques you can sustain an injury to your shoulder.The pain can be due to a muscle injury or a tendon swelling called tendinitis.
Next Steps
Kindly visit a Physio to get this shoulder pain diagnosed and for treatment.
Health Tips
you can apply ice pack on that area as of now.The physio will help you with the diagnosis as well as the steps necessary to avoid further injuries and guide you in proper lifting techniques