Solutions for Dry Skin

I'm trying my best to prevent my skin from drying out, but it's not easy.

When my skin is hydrated, it stays moisturized all day long and doesn't feel tight, which is great.

But it stays moist for a few days, then dries out quickly. There are many times when I feel that way.

I've checked various things, like whether I didn't drink enough water or slept poorly, but I'm not sure what the problem is.

I can't tell if the cosmetics are the problem or the weather. Or perhaps it's my lifestyle habits. I do think that might be having an effect, though.

I've tried applying various types of oil, but I haven't seen much effect.

Please let me know if you have any tips for moisturizing dry skin.