Please Read This

Question
QUESTION: my sister has this dog. the dog is a male jack Russell rat terror mix. she told me that she just noticed them she bought a new rug and she thinks its from that.i have a picture of these bumps.

ANSWER: I'm sorry what is the question here? She just noticed what? Your paragraph doesn't make any sense to me. Please ask a question and include a photo if you can.
Thank you.

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

QUESTION: my sister has a male jack Russell rat terror mix. last night she noticed that there was bump all round his stomach and lower legs area. i couldn't put the picture up. sorry for the first question. does it make any sense now ?

Answer
Yes, the question makes sense right now but I still can't tell you what they are. You mentioned a new rug and it is very common for dogs to belly crawl on them and get bumps and rashes.

If it doesn't clear up once you remove the rug then you need to get him to a vet.