I have a lump near the line of your knickers in the inside leg, it's deep on colour and very sore, it appears not to be a spot not sure what it can be?

Maybe a lymph node? From only your description and without examining you it is possible that this is an inflamed lymph node. I cannot tell from your description precisely where this is located. It is also possible that this is an abscess. Regardless i would recommend you have this examined.