Sexology is Not an exact of science. Sexual arousal needs a proper balanced work in cohesion by your body, mind, hormones, and circulation.
So at times many specialists are needed to help come out of a problem. If the need be psychaitrist and psychologists are also needed.
I would suggest you to meet Dr Venkat Ramana, Dr Alla Satyanarayana Reddy as sexologists. But for any psychological problem, they may refer you to a specialist.
Next Steps
You need to elaborate your problem. Many doctors do not know much about sexual medicine and hence just visiting them wont help.For psychological help you may contact Dr. Chebbi at Bangalore