Your nose has fully healed.
Your nasal skin responds to chemicals you swallow or inhale.
Cigarettes have several of the most toxic chemicals around--nicotine, carbon monoxide, and others. Alcohol is a potent vasodilator, and causes skin vessels to dilate, become more visible ("drinker's nose" particularly bad in those with Acne Rosacea), and thicken the skin slightly. These chemicals can cause what you are describing, but have nothing to do with your complete healing, they have to do with your still-living and responsive skin.
You should stop smoking entirely, and consume alcohol in moderation!
Patients planning surgery should stop smoking and alcohol consumption well before and continue after surgery to allow proper circulation and healing, and to reduce the risks of ischemic vasoconstriction, dead skin, and loss of cosmetic result with need for skin grafts or other reconstructive surgery!