what is wrong with my guinea pig

Question
QUESTION:  I have two female guinea pigs that i got from a pet shop, one of them is a little more laid back then the other, and when i touch her she generally doesn't do anything about it. Then the other guinea pig is more hyper and curious, and when i touch her around her stomach,and ribs she will squeal, and even kick my hand with one foot. I thought maybe she is ticklish, but I am not sure.

ANSWER: Guinea pigs that give a slow high pitch squealwhich increases in pitch are showing their dislike to being touched. Guinea pigs do not like their stomachs touched as it is an act of submission which makes them feel vunerable. She is possibly ticklish too but it is best to keep your guinea pigs feet on the ground to reduce any stress you may be causing.

---------- FOLLOW-UP ----------

QUESTION: I have two questions to ask about my 1 year old female guinea pig.
QUESTION 1~ Every once in a while I notice that my guinea pig seems to be wheezing when she breathes. I left, and then came back in the after noon, and she wasn't wheezing anymore. What is wrong with her?

QUESTION 2~ A couple of days ago i was rubbing my guinea pig on her head between her ears (one of her favorite spots) and then i left, when i came back in the afternoon, i noticed that she had a dark brown bump on her head that kind of looked like a mole. There was no hair loss, and when i touched it, it didn't seem to hurt her. I was wondering what it is, and if i should take her to a vet?

Answer
Any thing abnormal should be seen by the vet
I cannot do diagnosis over the internet.
With respect i did state this in my profile

I can only give you a brief of what it 'could' be

wheezing is a sign of a chest infection or allergy to dust it must be diagnosed ASAP as any infection can cause the guinea pig to go down hill within 24 hours, the bump on the head could be anything there are too many things it could be from a fat lump to a tumor