I had Juvederm injected in lower part of my nasal labial folds 2 weeks ago and I can feel the hard lumpy gel. What should I do?

I would recommend gentle massage to the area.  If that doesn't help I would go back to the person who injected you and ask about injections with hyaluronidase that can melt the material.

First off, it is common to have lumps palpable after a sturdier filler like Juvederm or Voluma for up to three weeks, but if it persists beyond that time period I would return to your physician for a check-up. It is possible to have a lump after filler from temporary swelling, excess product, infection or granulomas.  The latter possibility of granulomas usually is a delayed reaction that begins many weeks after treatment, so unlikely in your case.  In addition, when filler is placed in the nasolabial folds only to rejuvenate it may give some people a heavier look that actually is not effective at rejuvenating.  Many people with prominent nasolabial folds have upper cheek volume loss, and due to skin laxity and gravity get the nasolabial folds below.  That being said, it is crucial to first address the volume loss in the upper cheek by placing filler there before trying to rejuvenate with filler in the nasolabial fold area.  After filler is used to lift and replace volume in the upper cheek, often the nasolabial folds will in turn diminish.  We show this effect to our patients with pictures prior to deciding what is best for them.I would consider not dissolving unless the lumps persist, and instead look at your upper cheek for volume loss.