As much as you enjoy relaxing on the couch after a hard day, lumps in your couch cushions can put a damper on your down time. Lumps make the couch annoying to sit and lie on. Rather than throwing out the entire couch, use some old-fashioned manual labour to remove the lump yourself. This will help prolong the life of your couch, as well.
Massage the lump out of your couch cushion. Try to grab ahold of the lump and break it apart under the fabric with your hands.
Remove the cushion from the couch, if possible, and smack the cushion against a wall. Refrain from doing this in your living room or kitchen as dust from the cushion can get on flowers or living room knick knacks, or land on food. Smack the cushion against a wall on a screened-in porch or clean basement or garage wall.
Hit the lump with your hands. A clean shovel or similar tool can also work.
Place the cushion in your dryer if the cushion is small enough. Run it for a few minutes and see if the lump disappears.
For lumps that seem impossible to remove, use a foam cushion and slipcover over the existing cushion, or replace the cushion entirely.