Temporary mild discomfort after frequent masturbation can occur due to increased blood flow and fluid congestion, but actual testicular swelling is not normal. It could indicate an underlying issue like epididymitis, varicocele, or a minor injury, which requires evaluation by a urologist. Do not take self-prescribed medicines for swelling. To naturally increase semen thickness and volume, the most effective steps are to stay well-hydrated, maintain a balanced diet, and reduce ejaculation frequency. While supplements like zinc, folic acid, and Ashwagandha can support male reproductive health, you should consult a doctor before starting any to ensure they are safe for you.