A 39-year-old female asked:
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pencil-like red dots, cluster of 2 -4 appear then disappear in an hr. cause itchiness and rash which then disappears. have it a week now, neck, chest?

1 doctor answer
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
Hives: These are likely hives (if they are raised). If it is induced by heat (hot shower, exercise etc) it is called cholinergic urticaria. However we will need more details to venture an educated guess.
Answered on Oct 13, 2016

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