Hello anaz and welcome to HCM
You do seem to be suffering from
dandruff, also called seboerrheic
dermatitis. It affects
scalp and other oily areas like face,chest and back.
When this gets infected with
fungal infection, you get itching and pimple like swellings.
Firstly you need to keep the scalp oil free. Dont apply oil, gels, styling products till it clears.
Use a medicated anti dandruff shampoo with antifungal like Keto-B ,2-3 times weekly and then reduce to once weekly when you see good improvement. It is advisable to continue at least once a week as your scalp is prone to dandruff.
For the pimples and itchy area use an antibiotic
steroid ointment till they heal.Use similar antifungal soap or body wash over these areas for bath.
If you have
severe itching you can take an antihistamine like levocet for itching for a few days daily.
Once this is in control you will see an improvement in acne as well. But since your skin is oily, you will still have a few acne breakouts now and then. If you have many pimples on face, you may need to take antibiotics and treatment for acne.
Consult a dermatologist and they will advise you regarding the same after checking your skin and improvement with dandruff treatment.
Drink lot of fluids, avoid too much oily food, pollution and sun exposure.
Hope this helps you.