Great thanks for that additional info.
In a 2 year old Frenchie, the two most common lumps I diagnose are papillomas (warts) and histiocytomas (benign growths that tend to go away by themselves in 2-3 months). While from a picture alone it is impossible to say for sure what is going on, I would be most suspicious of a histiocyomta in this case. As there is a small amount of scabbing/dried blood it may be that he caught when he had a lick.
Another consideration would be something called a 'lick granuloma' which is basically an irritated and thickened area of skin that has developed secondary to excessive licking.
Try to discourage any licking. You can clap loudly when he tries to lick and distract him with toys/a walk/ a puzzle. If he is becoming obsessive about it, use a buster collar until he stops. It may take a few days of the cone before he learns.
You can clean the growth daily with warm salty water to keep it clean and prevent infection. Leucillin spray is also a great choice.
The only real way to know what a lump is, would be to take a sample from it (FNA or biopsy). If you are particularly concerned, you could get this done now but I would be happy to wait and monitor this growth for now. If it is changing/growing or causing Tee issues it should be sampled. Similarly, if after a few months it is not gone, sampling would be wise.
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