When liposuction is performed a cannula is inserted beneath the skin to aspirate or suction the subcutaneous fat targeted for removal. The cannula as it moves through the tissue creates a pathway which we typically refer to as "tunneling." In reality, it leaves a loose meshwork of connective tissue behind after fat removal rather than discrete "tunnels."The risks of liposuction, when performed appropriately are fairly low and include bleeding, infection, and fluid collections. Other more rare complications include emboli and lidocaine toxicity. The most common complaint following the procedure relates to contour irregularities (wishing more or less had been removed).As always, discuss your concerns with a board certified plastic surgeon (ABPS).