Spots which are irritating below my neck

Hello Sir/Ma'am, I am having some spots below my neck area and over my shoulders which are irritating me and because of this I am unable to sleep property at night. I consulted Practo dermatologist before, first one doctor told me to apply dewderm lotion however it didn't go away with that than I consisted another dermatologist she told me to apply momate lotion and on top of that apply derderm lotion two times a day I applied the pain had gone and the spots and the irritation had also gone however now again the pain, the spots and the irritation are coming back. Is it okay to apply again the momate lotion along with dewderm. When I consulted the dermatologist they told me that I might have either Pigmented Purpuric Dermatosis or Xerosis. Can anyone please tell me whether I should apply the Momate lotion along with dewderm lotion? Please do let me know and I would really appreciate your help🙂🙏🏻🙏🏻. Kind Regards, Manas.