Testicular cancer symptoms

Most common symptom is a lump on or swelling of the testicle
Testicle shrinking in size over a short period although rare can also be a symptom
Other symptoms include dull aches in the testicles, lower back pain with tummy cramps
ALL LUMPS OR SWELLING SHOULD BE SEEN BY A DOCTOR
epididymal cyst

Testicular cysts ( epididymal cyst ) are common in fact 1 out of 2 men have them. They are small lumps on the pipes or near the testicle. ALL lumps need to be checked out. Cysts feel like they are floating around near the testicle and most can be a little sore to touch.

movember

lUMPS ON THE SKIN ( SCROTUM )
lump_on testicle_skin

Spots or boils on the skin of the scrotum like in the photo are NOT testicular cancer BUT see a doctor in case of infection 

Testicles do ache from time to time, they are sensitive things , Knocking them, sitting on them even after sex they can be painful BUT if you think somethings not rite then see the doc

Get to the doctors, get them out.