As I was running my hands through my 3 months shihtzu, I noticed a lump kind of thing on my dogs back, below his head area. Today I took him to park for a walk and there were a lot of mosquitoes though. When I touch near the swelling or lump kinda a thing my pet does not feel any pain though. I noticed this lump today suddenly! What could be the reason? This lump is similar when humans have a mosquito bite. Wondering if it’s same?