I have had very very dry skin all my life. Do you have tiny bumpy areas? At one point they thought it may be due to a collagen problem. My skin now is doing better, and this is what I've done. While I think it might be good to have a dermatologist look at it, this is what I do for simple dry skin:
Bath and shower in just warm, not hot or really warm water
Use shower gel soap with little fragrance and a plastic scrubby ball to apply it (I like vanilla and sugar gel soap)
After showering or bathing I use a mineral oil based lotion to lock in the moisture every night (I like bath and body works or suave "sensual"--my son likes the Aveeno products)
I soak in epsom salts or dead sea salts to soften water. Perhaps the chlorine in your water is really high now or your water is really hard. The salts soften the water.
I use a collagen based moisturizer on my face--like St. Ives and used to love this collegen and elastin gel and used it for years at night on my face. Now I'm using some cheap family dollar vitamin E cream for my face and feet, and it is working well. For wrinkles around my eyes, I would take a strong vitamin A gel cap and puncture it and spread the oil around on my crows feet. Retinol is vitamin A. It works really well, but I'm less vain now. I do have surprisingly few wrinkles on my face for my age and health, and I think my friends advice of moisturing daily, especially at night after your bath or shower, really helps, because you have eight hours with moisturizer on with no makeup. Liquid foundation can cause problems and weigh your skin down.
When things were bad, I used to put baby oil in my bath water or on my skin in shower, but it is too slippery and I'm too clumsy now and I'm afraid I'll fall, and it gets on your towels and then they don't dry out well.
Some of the skin hair and nails vitamins work well. I used to take vitamin A when I was young, but stopped when I got liver disease, but it helped my skin. I am also on hormonal replacement therapy, which helped my skin.
Sometimes bad allergic drug reactions can cause dry skin, and they can be very dangerous--that Stephens Johnson rash, so if it is inflamed it can be bad. Also, remember to vacuum and sweep alot and change sheets because the dry skin attracts those dust mites, which i'm allergic too and many others are too, and then you scratch at night and it might cause more dry skin.
--Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us. Bill Watterson (1958-) cartoonist "Calvin and Hobbes"
Ills--Sjogrens-Lupus-like AI Disease, Hashis, Vitiligo, spinal stenosis/fusion with plate, salivary/lymphectomies, Diabetes, NAFLD, COPD, RLS, neuropathy, trigonitis, hystero, diffuse brain atrophy, GI nightmare
Meds--Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, Estradiol patch, Prosed, Detrol, Klonopin, Ultram, Vicodin, Restasis, Albuterol, steroid injections and pred prn