Hi and thank you so much for this query. I a so sorry to hear about these itchy bumps and the inconvenience it has caused you. Itchy bumps often represent an allergic reaction to a substance in the environment that the body cannot really tolerate. The best approach is always to identify the cause and address it.. However, if it i caused by heat as you suggest in your case, controlling it might be very difficult. It is rather preferable to relief yourself of the symptoms. Anti histamines like loratadine, chlorpenamine can be of help in this case so as to avoid scratching and the associated skin bleeds that come with it. It also increases the risk of a skin infection, too. If this shouldn t help, then consulting with your physician is going to be a good way forward for a closer interrogation, examination and maybe some investigation to re-orient and tailor specific treatment. Hope this helps and provides sufficient information for you to make informed decisions based on. I wish you a speedy relief from symptoms. Dr. Ditah, MD.