We have had our dexcom for about 10 weeks now. We always insert on the arms and have been switching back and forth. We usually go at least 2 weeks on each sensor until it starts to fall off as she doesn't like tape or anything to reinforce it but have never had one stop working. Until now she plays on ipad while I insert and she says "ow" and slightly winces and continues to play. She doesn't like it but its not a big deal. I tried using emla once but didn't seem to make a difference and since its not been that bad I gave it up. Last night I went to replace it and she shrieked in pain and started to sob. Then I noticed that there was bleeding in the window below the sensor. I wasn't sure what to do but since it was already in place I decided to put in the transmitter and give it a shot. In the first few hours it seemed pretty bad but our first calibrations were shortly after dinner with her numbers climbing which likely didnt help. Then it had her plummeting low when she was actually 130 and later in the night it was reading 300 and climbing when she was actually 200 (still not great). This am though it alarmed and said 70 and when I checked her she was 70 so maybe it is now on track. So my questions are about why it was so painful this time and caused bleeding and if I should still expect it to work or is likely to be a lost cause. I am hopeful the bleeding isn't a problem as I doubt I can talk her into replacing it so soon after this painful insertion.