I have a skinny body but fat arms. Dieting has not helped, what can I do to lose 2-3 cm in my arms?

Without a photograph I cannot comment on your specific issue. However, if you're thin but have unwanted fat in one area such as the arms you probably are an excellent candidate for liposuction.

You really need to see a lipo doc that specializes in lipo for arms, calves and ankles. There aren't many of us who can use the smaller micro cannulas and do the best quality work when it comes to lipo.  All docs do lipo but very few are experts. cost is roughly $4500 on special  and so worth it. sincerely, David Hansen,MD

Liposuction is the ideal way to treat disproportionate areas of fat deposition. Many of us store fat in an asymmetrical manner. The best way to find out if you're a candidate is to have a consultation with a physician who performs a lot of liposuction and can help you determine if this is right for you. Factors to consider are:location of the fatis the fat subcutaneous and accessible with lipothe quality of your skinexpectations for results: fit in clothing, or appearance without sleeves

Your question is a good one but very hard to answer without examining you.  Your options may include liposuction or CoolSculpting or even Brachioplasty, where tissue is surgically removed with or without simultaneous liposuction.  I recommend a consultation with a board certified plastic surgeon for an evaluation of your options.Good luck!