Is this a sudden finding? Any hard areas in either testicle?
That thing that you are feeling on the bottom of the testicle is a structure called the epididymis. This is where your sperm are stored. This is nothing to be concerned about. Sometimes, men have veins that can be larger on the testicle. This is also nothing to be concerned about. If you have seen doctors already for an examination, then you can be rest a sure that there's nothing abnormal with your testicle. Is all likely in your head. Testicle does not change in size. However, there is a fluid sack around the testicle and sometimes fluctuate in size. This can be normal as well. This helps.
Yes, it is normal to be able to see the veins only on one side. You may also be feeling the tube that allows the sperm to go to the urinary channel. You can definitely see the veins inside the scrotum. Everything you're describing is completely normal. Hope this helps and please don't forget to leave me a rating. Thanks.
Yes. That is the epididymis