In brief: Hydrocele or tumor. Hydroceles are a collection of fluid around testicle ; commonly first thought, by subject, that testicle inself is enlarged. Outline is smooth and feels like a tense fluid filled sac. Testis tumors are hard ; irregular. Leukemia, or lymphoma of testis can be a hard, smooth enlargement.
Adjusting your diet and exercise habits can activate the natural release of HGH from your pituitary gland. You need HGH for muscle growth and development and to increase your metabolism to burn more fat. But the benefits of synthetic versions of HGH have yet to be proven by any large scale evidence-based studies.
1 50 grams of brown fat can burn up to 300 calories per day, the same amount of energy stored by 50 grams of white fat.  When we are cold we produce the hormones irisin and FGF21 - these fire up the energy-burning rate of brown fat cells.