<s>[INST] I am 27 years old. During night time I will have pain in my legs.. What may be the reason for this??? [/INST] 1. rule out diabetes, calcium and salt deficiency, any relation of pain with numbness, burning, positional??2. Doing too much of aerobic exercises or standing/sitting for long hours causes calf muscles to get fatigued, which cannot clear the build up lactic acid, resulting in pain while retiring into bed.3. If your doctor see no problem of muscle fatigue, it could be circulatory problem, under active thyroid.4. Could be nocturnal cramps.5.  Advise of Physiotherapist and Ayurveda Buying (leg massage) are also useful clinical procedures.6. Start taking omega 3 fatty acids, and It. E long term therapy. </s>