Hello and thank you for using Heathcare magic. High inside or outside temperatures usually lowers blood pressure and it is not related to the medicine you taking. The heat dialates blood vessels and in that way contributes to lowering of blood pressure. In n my opinion you should get yout thyroid gland checked for any form of hyperfunction. Hyperthyroidism is a condition in which you can feel warmer than others around you, have a higher blood pressure even if you are taking your medications regularly. Thyroid gland problem are a common finding and cause of high blood pressure. A simple thyroid check up with thyroid hormones lab work and a thyroide echography would get you cleared up. Have a wonderful time ahead. Hope I answered all of your questions. Let me know if you have any further clinical concerns or doubts. I will be more than happy to get back to you in no time. If satisfied here, please give a generous five star rating and don t forget to close the discussion.