Before making the choice to buy Avita tretinoin, discuss the side effects with your local physician. Immediately after applying the medication, stinging of the skin can occur. Most common side effects reported were dryness, itching, redness, scaling, and a possible worsening of acne symptoms. These are possible within the first 2 weeks of treatment but are not suffered by all patients. More serious side effects that have been reported in patients who buy Avita tretinoin include blistering, swelling, skin discoloration, and conjunctivitis. With the increased sensitivity to sunlight, wind and cold can also cause skin to be irritated more easily.