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I think with this picture that he should be checked. I would advise just go shears to ER tonight. A fracture of a bone may cause a fevercas one possibility. If he injured soft tissue then an infection under the skin or cellulitis could be possible. You and he may look for reddened sore skin...internal injury may be possible
With him running fever I do worry if some infection. A CBC (complete blood count) may be run quickly at ER and would be useful to help determine significance of fever.
They could obtain xrays and other tests if needed depending on his exam.
I hope that this information is helpful for you.Let me know if you have further questions.I will be happy to get back with you.If my answers have been helpful and to your satisfaction then please remember to leave positive feedback Thank you and Best Regards,
Anthony Bray MD
Typos sorry (ahead to ER ...NOT SHEARS !!)