How To Cure Itching And Swelling Around The Injection Site In Ankle?

I am injecting clexane following an ankle fracture. two weeks in I am experiencing itchy swelling around the injection sites. My own GP is still trying to get further information as to an alternative but after speaking to the pharmacist and a haematologist was told to speak to the orthopaedic surgeon. at this point we had gone over my consultation time and so had to leave it! please can you give an opinion.