### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
hello doctorfor last few months im feeling really upset, frustrated and i think the reason is my activity schedule..theres no perfect timing of sleeping, eating..i feel very tired and lazy..plzz help me...suggest me how much should i need to sleep as im 17 and plz do keep in mind that ive to study atleast 6 hours daily, my school time is 6:30am to 2:30am and my other classes are from 5:00pm to 9:00pmand apart from this schedule i need to give time to self studies, and atleast 5-6 hrs. and my parents sugget me that i should wake up early in the morning and study even my professor suggest me that too...but im not a realy riser, i study late at night for about 2:00pm to 3:00pm and then i feel irritated the whole day..please suggest me a perfect time to sleep with ragard to my studies..and heatlh....also i want to tell you that whenever i face some tention or anythng my hands and foot get cold and i had consulted a doctor earlier, he asked me to consult a nurologist..

### output:

Hi, Thanks for writing in. Sleep hygiene is very important. You may like to reschedule your day and have a short refreshing nap for about 15 minutes in the afternoon. It is difficult to concentrate on any study for more than an hour, and you may take a 5-minute break after every hour of study. Also include simple activities like meditation and listening to music but not more than 10 to 15 minutes at a time. Try to get sleep by 12 o clock in the night and wake up by 6 in the morning. You will have difficulty for two weeks and then get used to it.