Hello dear, Thank you for your question. Considering the info you provided, I think you might suffer from urticaria (hives). In most cases they come from an identifiable factor like: certain foods, sun exposure, cold, pressure, vibration etc. The best thing you can do is to try to identify the situations that promote the urticaria. In this process it is crucial to consult an allergy specialist, who is trained and equipped to make special tests in order to identify the cause. Once a cause is established, the doctor will advise what to do to avoid getting urticaria. He/she might also prescribe some medication (most commonly anti-histamines). I hope this helped. Best wishes, Dr. Alma