I hava this area of skin too. My Obs said it was the nerves being stretched and bruisedfrom bubs. For me it is worst at night when I have tummy full of food, which then makes the skin really taught.

I first noticed it when I had my 4D scan done. The sonographer was pushing the probe thingy around my belly and she was pushing down quite hard. Well in that particular spot bubs had her bum and was pushing up. The sonographer was pushing the probe down, and it killed. So I think my skin and nerves got jamed between bubs and probe, and is now bruised from the inside and sensitive.