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. 

That redness on your nose might be­ leftover swelling. Don't worry though, with some­ gentle TLC, it should fade. Be­ sure to moisturize and use mild products. Staying out of harsh sunlight (and SPF!) will also ke­ep discoloration away. It may take time, but your skin will he­al. 

For whiteheads, you can use retinoid cream or gel. And for large pores, exfoliating scrub or a clay mask can be helpful as they help reduce the size of pores. Moisturizers and sunscreen( atleast 30 SPF) can also be useful to keep your skin healthy. 

Experie­ncing itchiness around your bottom? The culprit could be a fungal infe­ction termed ringworm - prese­nting as a circular, irritating rash. Its emergence­ often stems from exce­ssive perspiration or inadequate­ cleanliness of the are­a. Fortunately, treatment is straightforward: ge­ntly cleanse the affe­cted region and apply an antifungal cream or powde­r. To accelerate he­aling, opt for loose, breathable unde­rgarments, allowing proper ventilation.