Is ecchymosis possible after Septocaine injection?
although septocaine injection may cause ecchymosis, it's not supposed to last that long. You haven't made clear whether it's an ecchymosis at the site of injection or various lesions all around your body. If you're having persistent or recurrent ecchymoses then investigation is required. You should first check your complete blood count (particularly the platelets' count), bleeding time and the coagulation indices (INR and activated PTT). This is the first level of investigation. Depending on the results further investigation might be required.
Your medical history might be important too. For example, other symptoms or signs you may have, like fever, liver disease, hematologic disorders, drugs you use, etc.
I hope it helps!
If you'd like to provide more information about your case, I'll be glad to comment on them.
it's not the extraction...
I don't believe it's the extraction or the drug that caused it. The drug could have caused problems to platelet production but that's a very rare event. I suggest doing the tests I've mentioned to check whether the platelets (mostly involved in such cases) or the coagulation cascade work properly.