Scalp Acne ..HELP

hi have have pimples on my head and some time i have red spots on my head and it feels itchy a lot. i am losing my hairs from few years. i use to have very think hairs. now it is like 10% of them. i have very low iron in my body + i am under stress most of the time. my face is full for pimples marks .
What should i do? i get more stressed when i see the redness on my scalp. Is it a Cancer or what? i don't know .when i see redness or baldness or pimples on my scalp i feel weird . i am losing  so much of my hairs. :( heartbroken

[Caryopteris]

It sounds like Celiac disease.  Get tested.  

Try Wella Regulate shampoo and alternate that with Nizoral shampoo.  Take a gluten-free vitamin/mineral supplement. Check levels of these things, and then supplement further so that:  You get between 2000 and 4000 IU of vitamin D.  Take a total of 50-75 mg of zinc.  And take additional magnesium citrate on top of it too.  

If you can't afford Nizoral shampoo, you can actually try adding 1/2 teaspoon of baking soda to your shampoo.  Or do a diluted vinegar rinse after you wash your hair.  These things treat yeast overgrowth that can cause scalp discomfort and thinning.