It's a common myth that masturbation can lead to such symptoms but there is no scientific basis for it. Leg pain, for example, could be due to various factors such as muscle strain, poor circulation, or other medical conditions. Consult your nearest doctor/hospital for further advice.

The symptoms you've described could be indicative of various medical conditions. Leg pain and muscle cramps may be related to issues like nutritional deficiencies or nerve problems. Digestive problems could be linked to dietary issues or gastrointestinal conditions. Memory problems may have various causes, including stress or neurological issues. Sexual concerns, such as premature ejaculation, may be related to psychological or physiological factors.

It seems like you are facing side effects of excessive masturbation.. Masturbation is a natural phenomenon. All men do this but as a natural principle… excess of everything is always bad, so you must try to control it. 

Don't do it more than once or twice in a month. 

Don't worry you can do that... just do not watch porn… Try not to be remain alone, don't read or view sexual literature, books, whatsApp & porn videos etc. 

Avoid oily, more spicy, Chilly and junk foods. 

Do exercise daily for one hour or yoga mainly Pranayam… Meditation… vajroli Mudra... Ashwini mudra. Start reading religious books. 

Please note that now a days the main drawback and side effect of the masturbation is once you are addicted to masturbation mostly and always by watching porn… where you get different type of stories... relations... girls… body... and styles... etc. 

Once u got married u don't get all those things with wife so u don't get aroused and you don't get proper erection. 

Now a day's mostly patients comes to us with the complaint that they are not able to get erection with wife in the bed but they are getting erection in the bathroom while masturbation. 

This is creating a lot of problem in their married life so my advice is to control it. If u are not able to do so then you must consult your family doctor, many times it's not possible to control without the help of your doctor. 

You can take Chandra kala ras 1 tablet morning and night after food 

Yastimadhu chuma 3gms morning and night with water 

Sidhamakara dwaja 1 tablet morning and night after food. 

Do all the above suggested treatment for 3 months and see the results. 
If you don" get satisfactory results then you can also contact nearest Sexologist