They are complementary rather than competitive, which is why the recommended protocol rotates them across sessions

Often described as a permanent flush, it may also present with other known symptoms such as, Permanent or persistent facial flushing across the nose and cheeks Enlarged or broken facial capillaries (telangiectasis) Frequent blushing Swollen nose or cheeks (hyperplasia) Lumps under skin (non-tender) Pimples on forehead, cheeks & chin (yellow-headed) Facial burning, itching, stinging sensation Eye complaints, including red, swollen, itchy, irritated eyes and/or swollen eyelids Enlarged nose, thickening of nose skin (more common in men than women) Rosacea can also be classified into four sub-types: Subtype 1: Erythematotelangiectatic rosacea (sensitivity, redness, flushing) Subtype 2: Papulopustular rosacea (red papules, pus-filled pimples, alongside facial redness) Subtype 3: Phymatous rosacea (skin thickening, bumpy on nose) Subtype 4: Ocular rosacea (eye &/or eyelid inflammation, sometimes no skin symptoms are noticeable) It is important to note that symptoms can fluctuate depending on the individual and the listed subtypes are just a guide to support treatment

It's a small cost to ensure sterility
Piao et al., 2015)