Hi there ~ I understand your concern. Burning sensation during intercourse is usually due to dehydration or more uncommonly due to urinary tract infection. You may need to consult a doctor regarding this so that appropriate tests are ordered. Sexual issues after marriage are quite common. However, anything in excess, even masturbation is not good for you. Although, you might need to consult an psychiatrist to find out if you have any difficulties in your libido or have other mental health concerns like depression that is resulting in your premature ejaculation. Yes, sexual problems may be treated. You have a very common problem of erectile dysfunction and / or premature ejaculation and it can be easily treated with medications available during this time. The class of medication is called phosphodiesterase 5 inhibitors (PDE5Inh) selective serotonin reuptake inhibitors and it also helps with decreased libido which is a result of depression if you are going through one. I advise you to consult with a qualified psychiatrist who might be able to help in this regard. I hope this helps. Take care and have a lovely day!