How to cure dark underarms? Any cream suggestions?

Dark underarms can be lightened with topical application of Melarase creams and Melapads. Both products will work over time to even out your skin tone. Best, Dr. Karamanoukian Los Angeles

These a very difficult to treat as most of the time they are acanthosis nigricans a genetic condition of skin thickening and color change. I do a lot of chemical peels, microneedling, and clear + brilliant or Viva here with great results.  But nothing is curative, you can expect some improvement.  Best, Dr. Emer.

You may have a condition called Acanthosis Nigricans. This can occur as a consequence of obesity, medications, or a prediabetic condition called insulin resistance. Thus, before treating the symptom, it would be important to determine whether you have the disease.    If you are prediabetic a drug called Metformin would be helpful. This would improve the Acanthosis Nigricans and should stave off diabetes for a number of years.   Weight loss also usually helps, so if you are overweight, a diet plan would be advised.    Some cases are made worse by Nicotinic acid so if you are taking this for acne, or lower triglycerides, it would be important to switch to other medications.Omega 3 fatty acids, fish oil, will improve this problem. Natural omega 3 fatty acids can be found in salmon, mackerel and anchovies.  As for topical treatments, Tri-Luma cream applied twice a day will help both with the thickening and discoloration. Otherwise Tretinoin 0.05 cream or Cerave SA Renewing Cream would be good. Retriderm by Biopelle might also be tried. The latter two are other the counter.