Should I do more reps since I don't feel sore after working out?

I've been working out for about 3 months I first used 10 pound dumbells I got sore for a couple of days I continued using them for a month then I got 15 pound dumbells but I felt sore for only 2 days I continued using those then a month later I got 20 pound dumbells and I didnt feel sore at all after using them so is that a good thing or should I do more reps to feel sore. any advice would be greatly appreciated thank you

After you've been working out a while, you're muscles adapt so that you will generally not be sore for long. If you've been working out for a while (and you have now), a good workout will result in some very minor soreness the next day (nothing like the horrible pain you probably experienced when you first started), but it will be gone the day after that.

If you're not feeling *any* soreness the next day, you could push harder. But you're doing the right thing, which is to build up slowly. A lot of people will try to push too hard too early and end up with an injury that takes weeks to heal.

hi your muscles get used to your workout I'm assuming you want to get bigger arms or whatever your working its always good to increase the weight your lifting.It also depends on want you want do you want to build mass or get cut?

 
I might be wrong but I think increasing weight increases muscle and strength whereas increasing reps increases stamina.

Feeling sore in the begginning of any workout schedule is perfectly normal, and a lot of folks would say is a good thing. Your doing everything fine it appears, and as far as not feeling sore anymore, that's a good thing too. You body will get used to the same strain on your muscles as you work through your weeks on whatever program you've chosen. Once your bodies hits a 'plateau', you will be forced to do what we call an 'explosive' workout used to give a quick hard shock so to speak to your muscles. After about a week of that then go back to your routine and try doing different exercises with the same weights, like instead of keeping your arms straight, try rotating your wrists a bit and put tension on other parts of your muscle groups, sorry I felt like typing...