Hi, thanks for using healthcare magic
In persons with dry skin
it is recommended that moisturising creams or lotions be used within 3 minutes of bathing with some of the water still on the skin to help retain moisture.
There are specially recommended creams for increasing moisture and if these over the counter are ineffective then your doctor can possibly recommend the use of urea and glycerine which helps in dry skin.
As the moisture increases the dry patches would be eliminated.
I hope this helps