Stiffness always takes place after immobilization. Muscles get tight with pain and lack of range of motion and sometimes swelling too. Vigorous Physiotherapy is required without any massage. 10 days are very less. Pain occurs during exercises but you will have bear it. It generally takes 6-8 weeks to recover completely
Next Steps
Go to a physiotherapist.. Wax therapy +Active+passive (light) +resisted exercises are very much important.
Health Tips
At home.. Hot water fomentation +full range movements +no weight lifting +no weight bearing on right hand/elbow /arm.