As you can see, the greatest climate change during the year comes between the summer and winter months. In places like Kahului, Maui, the decline in temperature is as much as 10 degrees Fahrenheitâdropping from an average temp of 79.2 in August to a chilly (for Hawaii) 68.9 average in January.
Vitamin C, in the form of L-ascorbic acid, has anti-inflammatory effects that act specifically on the blood vessels which can reduce redness and irritation of the skin. Vitamin C can also control the release of histamine, a chemical that dilates the blood vessels during an allergic reaction. Because it can reduce redness and prevent excess blood flow to the skin, vitamin C may be beneficial in controlling the swelling and redness associated with rosacea.
Short-term topical cortisone (steroid) preparations of minimal strength may, in occasional cases, also be used to reduce local inflammation. Some mild steroids include desonide lotion or hydrocortisone 0.5% or 1% cream applied sparingly once or twice a day just to the irritated areas. There is a risk of causing a rosacea flare by using topical steroids. Some doctors may also prescribe tretinoin (Retin-A), tazarotene (Tazorac), or adapalene (Differin), which are prescription medications also used for acne. Isotretinoin is infrequently prescribed for severe and resistant rosacea. Often it is used after multiple other therapies have been tried for some time and have failed. Isotretinoin is not typically used in rosacea and it is most commonly used in the treatment of severe, common acne called acne vulgaris.