Please tell me if it is possible to heal gynecomastia without surgery?

You need an exam: Are you overweight? This condition can arise on its own or can be secondary to certain drugs (ie marijuana and many prescription meds) and also can be secondary to hormonal problems that may signal a bigger issue. If you aren't simply overweight consider seeing your md. You need a testicular exam, review of your medications, and several blood tests that are not part of routine bloodwork.

Seek Consultation: Pubertal gynecomastia often resolves within 1 to 3 years after onset. Adult onset gynecomastia however does not necessarily do so. If persistent, it is often best treated with partial excision of the prominent glandular tissue as well as liposuction surgery of the peripheral chest area. If the prominence of the chest wall is caused by adipose tissue, then liposuction surgery may suffice.