You can determine if you have dry skin by observing how your skin feels after face wash:

1. After washing your face, if your skin feels tight, rough, or appears flaky, it's likely you have dry skin.
2. Dry skin can sometimes have a dull appearance and may be prone to redness or irritation.
3. If you consistently experience discomfort or dryness after cleansing, it's a sign that your skin may be dry and in need of extra moisture and hydration.