Hello sorry to hear about your recent fall. If you have stitches it is best to get exemption from any strenuous activity. Scars on the leg will typically take 2 weeks to heal. During that time, the wound should be kept clean and dry to prevent infection. Also strenuous activity may put your wound at risk of dehiscence, where the stitches come apart and the wound opens up. Hope you recover quickly and are able to resume your normal activities soon!
Best regards
Dr Stephanie Ho, Dermatologist
