Untrimmed claws might eventually grow into the pad, causing injury and even infection. Younger cats are less likely to have these problems, since they wear down their claws. Still, they should also have regular trimming.
You might notice a lot of small holes in your clothes, furniture, and – even you! Since your cat’s claws are too long, she won’t be able to keep them tucked away while walking around the house, instead – she will have them out.
Always start with the least amount of restraint needed and then work your way up from there. Don’t rush this process; give you cat some time. Also, remember to use treats if your cat is food motivated!