hello..thanks for sharing your query
Since it is already 8 months since the insertion was done, I wont think that the Implanon
should be a cause of the rashes you have.
You may apply a mild topical steroid
for 3-4 days to see if it improves.If you have itching, oral anti histaminics may be taken.However, if your lesions persist , you must visit a dermatologist
rash is a pregnancy
related condition and resolves mostly within a week of delivery. A few women continue to experience symptoms into the postpartum period, but i think this not be related to the present symptoms.
Hope this is helpful.Take care.