From your photo, it looks like papular urticaria

Papular urticaria is also called urticarial lichen and infantile lichen. It is a common allergic skin disease in infants and children, but adults can also suffer from it. Often several people in the same family get sick at the same time. It occurs more often in spring and autumn. This disease is named after the characteristics of its symptoms. In fact, this disease is insect bite dermatitis. The clinical characteristics are scattered, slightly hard papules with vesicles at the top. There is spindle-shaped redness around the edges and itching occurs consciously.