hi welcome to HCM i really appreciate your concern and i gone through your query,asprine is not effective in sprain but some helpful as a pain killer , anti-inflammatory property but this is not muscle relaxant ,it is anti thrombotic property increase bleeding tendency means bruise,and major side effect is gastritis so aspirin not recommend ,u can use combination of muscle relaxant chlorzoxazone and diclofenac along with heat application and take adequate rest ,apply crepe bandage. I hope this answer was helpful to you! Please kindly rate it and write a short review about your experience with me! Thank you and best regards! .