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Staphylococcus aureus often leads to skin infections, boils, and even more serious problems such as bloodstream infections. It's caused by bacteria that may be hard to completely remove from the body. If the usual treatments like augmentin were ineffective in getting rid of the infection, vancomycin recommended by your friend is worth considering. Vancomycin is an antibiotic usually used as a last resort for persistent staph infections, especially those that do not respond to other antibiotics. When using vancomycin, it is important to follow your doctor's advice on dosage and treatment duration. 

Melasma is a skin condition that can be managed and treated, it may not be completely curable or permanently eradicated.

Razor bumps in the bikini area are a common cause for concern. Injuries to follicles that occur through shaving are usually behind these bumps. They are typically red, itchy, and with small bumps. When ketoconazole cream does not help, another alternative is the use of a mild hydrocortisone cream that can help to control inflammation. Put on some lotion to the part all the time so it stays moisturized.

Without a proper evaluation and diagnosis, I can't say. But normally, suggested treatments for perical pigmentation include topical medications and laser treatments and I do not recommend flutivate cream for pigmentation. However, based on your individual condition, the doctor will recommend the best treatment for you.