Hi!
Where is that bump located exactly? What's the size of it? Does it have different color than normal skin color?

the lump is approx. 3 inches long, 2inched wide and about 1/2 inch
deep.
It is so itchy, and the colour is a bruised looked.
It is solid the doctor here says it is a fat tissue.

Is this lump soft, rubbery or doughy consistency on touch? Does it move easily under the skin with the fingers? Does it depress when you touch it on? Do you feel itchy only on the lump or on the larger area of your back?