Hello dear,
First of all, remove all myths & misconceptions from your mind about
masturbation.
In fact, Masturbation is completely normal & doesn't have any bad effect to the body and mind.
The symptoms as mentioned in your post can be attributed to:
1. Nerve compression due to incorrect posture.
2.
Peripheral neuropathy.
3. Musculo-skeletal injury.
4. Any fluctuation in blood pressure & blood sugar levels
5. Inadequate hydration & nutrition status.
6. Deficiency of certain nutrients like Iron, Vitamin B 12, Calcium, Magnesium, etc.
Investigations like
complete blood count, estimation of blood pressure and blood sugar levels & X ray of the wrist joints will be helpful in clinching the diagnosis.
Symptomatic relief from pain can be obtained with application of analgesic+
muscle relaxant gel.
Nervigenic agents (like Vit B6, B12, Folic acid) as well as
multivitamin & mineral supplementation needs to be added in the diet.
There is no need to worry, you will be fine.
Meanwhile, maintain adequate hydration, take a healthy balanced diet & avoid stress.
Wishing a good health.
Take care.