Head bubbles?

lglf4

My Chihuahua has bumps, almost like soft bubbles on his head sometimes, and after a few hours they go away...?  Usually he just has one bubble, but tonight he has four.  He has no other symptoms, and he lets you pet his head without any reaction.  I mentioned this to my vet, and she looked at me like I was crazy (his head was normal at tht time).  She talked abut the molera, but didn't see how he could have any bubbles/bumps on his head.  I've already researched moleras and hydrocephalus--it doesn't appear to be hydrocephalus.  Could his little molera be swelling, or something else?  I don't think it's urgent, but wanted opinions.  I have two other chis, and they don't have this issue.  All are rescues, so I don't know much about their background.  If anyone has any thougts, I'd appreciate it--thanks!

aggiebug

how big are they? to me they sound like hives I don't know what he would be reacting to but that is what my initial thought was

lglf4

Hey Aggie,  thanks for the reply.  I hadn't thought of hives.  I can't determine a trigger.  The ubbles are about the size of a small, round raisin.  We'll keep an eye on them.