My age is 24. Height 6 ft. Weight 76 kg. From 1 and half year I am noticing reduction in my testicle size so 3 month ago I went to a urologist he ordered ultrasound of my testis it shows right measures 2.5 cm*1.5 cm and left measures 2.5 cm*1.6 cm.all the dimension are in cm please note. I think they are small in size. But ultrasound shows normal. But as three months has been passed I noticed further reduction ,now they are of almond shape and siZe. And the skin on the right side of penis and testicle is changing. It is not black mow it became reddish in colour. Half skin of penis connection to right testicle is became reddish. Whenever there is cold the left testis properly settled inward and right testis remain outside in unusual position. What is the problem?