Why did I get random hives on the side of my cheek ( pic ) ?

Is been a while since I had these bumps. There was a time were i was constantly getting these at random times. I don't know what they are but they start small then get itchy and bigger I don’t think they have liquid inside , at least I haven’t seen anything. They usually get smaller and dry and go away. These appear this week and I didn’t eat or do anything out of the ordinary

Why did I get random hives on the side of my cheek ( pic ) ?

Day two - smaller and dryer

Why did I get random hives on the side of my cheek ( pic ) ?
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