Hello
Is your lump soft to the touch, moves easily if prodded with your finger, is just under the skin mostly colorless and is grow slowly? then your narration corresponds to LIPOMA.
Its harmless, benign meaning not cancerous(except for 1%), chances of spreading to other parts of body is usually less typically appear on the neck, shoulder, forearm, arm, thighs. Unless there are other syndromes affecting its increase.
In Homeopathy internal medicines are customised for you, so that the fat metabolism is regulated, halting rapid increase in numbers,size or entirely remove the tendency for it.
Next Steps
Please accept it as a part of your legacy !
Health Tips
If its not pressing on your nerves causing pain(as in Angiolipoma), pressing on Vital organs, disfiguring beyond looking, only then go for invasive procedures.