The "heat" you are feeling is probably some hypersensitivity or increased blood flow to the area as a normal physiologic response for healing in the absence of infection.
Regarding your complaint of Post Tumescent Liposuction Hard Lumps - here are some answers about its cause and treatment
Massage can help manage firm lumps and bumps following liposuction to a varying degree. If the reason for this firm area is because of residual edema (called induration) then it will likely be gone by 6 months. Other causes may be from a localized seroma, liquefied fat pocket, or a fat deposit that did not survive.
Therapeutic or "lymphatic massage" may be helpful following a Liposuction Procedure to minimize swelling and resolve some of these firm areas.. Make sure your surgeon feels that you have healed sufficiently and it is safe before doing this. Endermologie is also very helpful after liposculpture/liposuction but again, not critical. Although deep tissue massage following liposuction can aid in smoothing out contour irregularities that invariably accompany this procedure it has limited effect on the final outcome and is NOT mandatory. Some plastic surgeons recommend it to all patients as they feel the edema resolves faster. Ask your surgeon to show you or a significant other how to do this if cost is an issue. Typically they will have you massage toward areas of maximum lymphatic drainage ( for example groin or armpits) A low sodium diet may also be helpful early on.