You seem to be having dermatographism. Dermatographism can be caused by <span style = 'background-color: #dae8f4'>stress</span>
, tight or abrasive clothing, watches, glasses, energetic kissing, heat, cold, or anything that causes stress
to the skin. It can be treated by antihistamines or cromoglicate and
sometimes steroids, as they prevent the histamine from causing the reaction. As the underlying cause of dermographism is not known, it can last for many years without relief. My sincere advice would be to consult an allergist.