Hello,
The cause of pain, hot sensation, and purple spots could be due to injury which you have not mentioned the query, or due to disturbance in blood circulation. There is nothing to be worried about as of now as your leg is not numb or turning black. Moreover, at the doctor you will be examined for any loss of sensations, restriction of movements, ankle pulses, reflexes. In addition, investigations like X-ray of limb involved (to look for any
soft tissue or
bone injury), Doppler study (to asses the blood circulation of limb), and blood work up will be required to make diagnosis.
In the meantime, wear loose fitted clothing for better blood flow, avoid standing or sitting in same position for long time, give rest to the leg, and use comfortable footwear.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Ayesha Shareef, General & Family Physician