Head Lumps More Condition_symptoms What Are The Weird Lumps On My Head?

What are the weird lumps on my head? - head lumps more condition_symptoms

I am 16 years old and for months I have received, these little bumps on the back of the head. In fact, the spread or transfer. They come for a few days (sometimes several at once), then they go and come in a few days. They are a little hard and sometimes low. Also very bad itching. Looked like my mother and my friends have and there was nothing that does not bite or something under the skin. I can not, could someone please tell me what they are and how to get rid of them.