I have discomfort coming from my left testicle. i checked it and i couldn't tell if it was swelled but no bumps. i wear boxer briefs everyday.

See answer: Periodic discomfort in one's testicle(s) is not an uncommon occurrence and in the absence of any noticeable swelling or palpable masses or "lumps" is likely to be self-limiting and short-lived. Often related to mild irritation or congestion and observation and an otc NSAID (ibuprofen) may be all that is needed. Persistence or worsening of discomfort, swelling, lumps, etc warrant a visit to the md.