Your scalp is more likely to suffer from dryness, flakiness, irritation, and itching during winter. Existing conditions like dandruff, psoriasis, and seborrheic dermatitis can also aggravate due to the dip in humidity. Senior Consultant Dermatologist Dr T.N. Rekha says you need to switch to milder shampoos and use good conditioners. You must avoid exposure to extreme temperature, exfoliate regularly, and skip all hair treatments. And do not go days without washing your hair due to fear of catching a cold.