hypopigmentation

I have had a problem which i've been trying to fix for quite sometime. I am a mixedMixed respiratory vaccine race male who has lighter, non scaly patchesAllergy testing
Skin color - patchy on my neckCervical spondylosis
Head and neck glands
Herpes zoster (shingles) on the neck and cheek
Irritated seborrheic kerotosis - neck
Lymph tissue in the head and neck.
Melanoma - neck
Neck lump
Neck pain
Neck pulse
Neck x-ray
Oral cancer, arms, handsHand or foot spasms
Hand tremor and back since i was around 8 years old. I have seen numerous dermatologists throughout the UK and also one in the Netherlands, but as yet they cannot determine what is actually causing this problem. they suspected TineaAthlete's foot
Athlete's foot, tinea pedis
Dermatitis, reaction to tinea
Folliculitis
Jock itch
Ringworm
Ringworm, tinea capitis - close-up
Ringworm, tinea corporis on an infant's leg
Ringworm, tinea corporis on the leg
Ringworm, tinea manuum on the finger
Ringworm, tinea on the hand and leg/Pityriasis Versicolor, but i have tried selsunSelsun
Selsun blue
Selsun blue 2 in 1
Selsun blue balanced treatment
Selsun blue moisturizing treatment, itraconazole and canesten to no avail. They also thought it may be hypopigmented mycosis fungoides, but i also took an autoimmune suppressing cream to no avail either. I then travelled to see a doctor in the Netherlands who suggested it may be Progressive Macular Hypomelanosis, though i am just finishing a course of minocycline 100mg combined with benzoyl peroxide and UVB but theres been no great improvement their again. I have no history with pigmentation problems in my family and wasn't born with any problems regarding pigment. Any suggestions regarding what to try next or any dermatologists who specialise in this type of thing? I have been most disappointed by the NHS doctors in the UK as although they can clearly see there is a problem, they do nothing to try and find the root cause of it, very frustrating.