I have fat lump on one of my arms. How can this be treated? (Photo)

Based on the size of this area on your left side, it will require operative removal. I would also recommend that it be sent to pathology as a possible area of accessory breast tissue. This will leave a scar but should help considerably with the contour. I am unfortunately not sure about the coverage under NHS, but if there is a possibility of it being accessory breast tissue and requiring pathologic evaluation this may aid in coverage.

Thank you for your question regarding the fat lump on one of your arms. An arm lift and reduction also known as a brachioplasty with liposuction is the best way to get rid of that excess skin and fat.

Steps for Arm Lift & Reduction: Liposuction is performed to remove excess fat of the arms, an incision is made, usually from the armpit to the elbow on the inseam of the arm. The arm is dissected, and as much skin and fat is resected. Since the incision is on the inseam of your arm, it will not be seen unless the arms are up in the air. I believe that an arm lift and reduction is the best option for you because liposuction alone will leave you with excess skin. I have thousands of past arm with patience, and all of them have felt much more confident after having this procedure. Thank you for your question regarding the lump of fat in your arm and I hope this helps.

I specialize in arm lifts. I hope that I have answered your questions regarding the arm reduction. If you have any more questions regarding the arm lift, arm reduction, brachioplasty or arm crease fat grafting, please contact my office. Since a brachioplasty or arm lift surgery is a difficult procedure, please seek an experienced, board-certified plastic surgeon with significant experience performing these types of arm lifts. Do your research. Make sure your chosen plastic surgeon has performed at least 100 arm lifts. Make sure they have the before and after pictures to prove it. Carefully examine their before and after pictures and check their reviews on RealSelf.  

Sincerely, Dr. Katzen. (“Verified” Plastic Surgeon, President of the American Society of Bariatric Plastic Surgeons, certified by the American Board of Plastic Surgery, Fellow of the International Society of Aesthetic Plastic Surgery, American College of Surgery, International College of Surgery, and American Board of Metabolic and Bariatric Surgery, and ​member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery and RealSelf Hall of Fame.)

Dear Angel0306,
it is hard to tell for sure without an examination. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

The excess skin and fat can be excised, especially on the larger side. Both sides could be excised, or liposuction could be done on the side with less fat and skin.

I encourage you to begin by having the lump examined to ensure there is no medical cause for concern. If it is a pocket of subcutaneous fat you can consider a brachioplasty to remove the lump and contour the arms.

Reviewing your photos, you seem to have excess skin and fatty tissue in the arms, especially in your left arm. The 'lump' is more pronounced on the left side, most likely due to stretch marks. The good news is that these lumps are localized, so a mini arm lift (short scar arm lift) will effectively remove the excess hanging skin. Additionally, you can have liposuction done to better contour the area. These are cosmetic procedures, of course.

The fat lump can be removed. You should however have some investigations ( ultrasound) prior to make sure this is fatty tissue only, as at times other tissue ( for instance blood vessels can form similar lumps) can be the cause.
The lumb can be removed, either with liposuction alone of liposuction and skin resection, to make both arms symmetric.