The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
Thanks for your question.
These white dots can be from your itchy skin or the scalp.
Seborrheic dermatitis is the common cause.
This condition is due to the problem with the oil glands on your skin and the scalp.
You should consider getting a steroid cream like Lidex ( fluocinonide) ansd apply twice daily after soaking your skin and scalp with water.
Lidex cream requires prescription.
This should cure your problem over time.
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Yes, these bumps are also likely related to the same condition.
another possibility is accumulation of excessive keratin in your skin pores.
This can also cause itchy red bumps.
But the treatment is the same along with some moisturizer.
avoid dry skin and scratching with fingers
Lidex will help.