It requires immediate visitation to a urologist. The cause of the disease may be injury, infection or testicular cancer. This underlying cause needs to be diagnosed by a medical practitioner 

In that case you need to consult a sexual health specialist. Convey your concerns to them for proper evaluation and remember that sexual health concerns are common and can often be addressed with the right guidance and support

PENIS ERECTION AND PREMATURE ejaculation CAN HAVE various causes.. 

Physical conditions like diabetes, high blood pressure, or prostate issues may affect erections.. 

Psychological factors like anxiety, stress, or depression can cause both problems.. 

Lifestyle choices like smoking, drug, and alcohol abuse also affect sexual performance.. 

Maintaining a healthy lifestyle, TALKING TO A THERAPIST, or taking medication may help.. 

Consult a doctor if problems persist or cause distress.. 

Remember to communicate OPENLY with your partner and prioritize mutual satisfaction..

Based on your description of the symptoms, it might be that you had an acute urinary tract infection and antibiotics were used to treat it. Drinking plenty of water is needed and energy drinks should be avoided because dehydration can make UTI symptoms worse. If you are still shaking or experience other similar symptoms after the treatment, you should go to the doctor who prescribed the antibiotics to you or see a urologist.
 

Masturbation is normal and healthy sexual activity for most people and normally does not cause permanent damage to the penis. But excessive or aggressive masturbation may lead to temporary discomfort, such as soreness. Its impt to practice moderation and use lubrication if needed to avoid excessive friction.