Lump/growth/infection

My  2 year old female staffy has this growth/lump of some sort near her vaginal area, she keeps lick it and sometimes biting it. It’s swollen, was more inflamed a day ago. It doesn’t seem to be painful to her if I touch it but it does seem to be irritating her. Her behaviour is as normal so is her appetite and thirst. She is fully vaccinated but not desexxed im trying to add photo

Hello and thankyou for this excellent question.   As you know, some lumps and swellings - of the sort that arise in any area - can be cancerous, so lumps are always a cause for concern.  Others can be inflammatory - for example secondary to an injury or a bea-sting.  However, given where and how this has appeared - and that you haven't told me whether or not your staffy has been speyed - it is also possible that this is hormonal, connected to your dog coming into season.  We are also now realising that, even if a female dog has been speyed, there can be hormonally active tissue still within their bodies that can cause swellings of the vulva.  If this is hormonally driven, there is a good chance that it will resolve by itself over the coming days.  However, given the other options (including trauma - and in extremis - cancers of this area) and also in the interests of preventing pain and self-trauma, a veterinary examination would probably be a good idea.