Extension Exercises x 15 times x twice daily - lying on tummy, take left arm up for 3 seconds, then bring it down, right arm up for 3 seconds, bring down. Bring right leg up, hold for 3 seconds, bring it down. Then right leg up and hold for 3 seconds and bring it down. Repeat twice a day- 10 times. Bhujang Asana -- Lie flat on your stomach, keeping the palms out, bend the neck backward, take a deep breath and while holding it for 6 seconds, raise the chest up. Release breath and relax your body. Repeat the exercise 15 times twice daily. Core Strengthening Exercises- Straight Leg Raised With Toes Turned Outward, repeat 10 times, twice a day.

Take hot pack and apply volini gel for pain relief .avoid stretching the arms and thorax .you can also take pain killers.go for 2 to 3 days

Hi..May be your inter costal muscle got strain due to accident..Apply Ice or hot formatation 2-3 times a day.Relax your self. avoid lifting activity.If pain is persist than take pain relief physio treatment with minimal intensity.Once pain is less start breathing exercise.