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From the available history and the possible interpretation of your doctor, it is possible that you may be having lipoma or a Angiolipoma.
A lipoma is a non-cancerous tumour that is made up of fat cells. It slowly grows under the skin in the subcutaneous tissue. A person may have a single lipoma or may have many lipomas. They are very common.
Most lipomas are symptomless, but some are painful on applying pressure. Lipomas that are tender or painful are usually angiolipomas (adiposis dolorosa or Dercum disease). This means the lipoma has an increased number of small blood vessels.
In case, you are bothered by the condition then you can consult your doctor or a surgeon who can have them removed by simple excision procedure or via Liposuction.
In addition, weight loss via exercise and low fat diet to reduce the body fat content will also be helpful.