Sore on variuos parts of body. In this!

I have been suffering with sores since last 5 months with a regular interval of 10 to 15 days.First on the front portion of my head after that 2 appears on the back side of my head.I have consulted local dermatologist who diagnosed as psoriasis to my shock.I am using hair dye since 2013.After that I have stopped using hair dye. How ever my family Physician disagrees the same and the cause may be due to some infection. Previously whenever I suffer with itching I used to apply NIZORAL medicated shampoo since last 10 years very rarely.At that time I haven't suffered with these sores.In october2016 I have removed all my hair on head to perform last tributes to my mother.Since than I am suffering with these sore problem. 2 sores on my cheeks twice ,a small sore on left knee and now a sore on my left thigh with pus creating inconvenience. I am suffering with B P since last 12 years and using medicine for that. Kindly advise me in this regard as i have already consulted 3 doctors with no us