My friend (female) has psoraisis mostly visible(start with) on feet palm and sometime can be seen on upper body. At present only 1 or 2 spots can be seen, she is not taking any alopathic medicines as of now. 1. Is it curable permanently by any means? 2. Is it hereditary? Can possibly come to her children? 3. Can it change it's type in future and can majorly affect the body skin? 4. Can it affect or increase at the time of pregnancy or after child born?