Many people feel tired after a sleepless night, during a particularly stressful day or when seasonal allergies kick in. But, if you regularly feel weary after waking from a good night’s sleep or for no apparent reason, it’s time to find out why. Then, you may be able to do something about it.

Try these tips from the American Academy of Family Physicians to increase your energy level and fight fatigue:

• Make sleep a priority. Irregular sleep patterns may be the problem if you go to sleep and wake up at different times every day. Set your schedule so that you sleep seven or eight hours a night. If you need more or less sleep to feel rested, adjust your sleep schedule accordingly.

• Avoid certain substances. Alcohol, caffeine, tobacco and stimulant medications may cause fatigue or make it worse. And, some of them can harm your health.

• Eat healthy foods. A balanced diet that includes plenty of fruits and vegetables may help stabilize your energy level. But, avoid foods and beverages that are high in sugar and fat. They tend to have little or no nutritional value.

• Stay hydrated. Dehydration can cause fatigue, so drink plenty of water throughout the day.

• Manage stress. To help you relax, try deep-breathing exercises or meditation.

• Energize with exercise. Regular, light to moderate physical activity -- at least 30 minutes, five times a week -- helps your body become more efficient when you’re active or at rest. But, don’t exercise just before bedtime. Remember to talk with your doctor before beginning any exercise program.

• Take care of your emotional health. Fatigue may accompany anxiety, depression or other mental health conditions. If fatigue and emotional problems are affecting your ability to do daily tasks, bring up the subject with your doctor.

• Review your prescriptions. Many medicines, such as antihistamines and diuretics, may make you feel tired. If a medication seems to be affecting you this way, your doctor may be able to adjust the dosage or prescribe a different medicine.

• Track when you’re tired. Keep a written log of your fatigue and review it with your doctor. This may help him or her determine the cause.

Sometimes, an underlying health condition such as anemia can cause fatigue. So, if these tips don’t seem to be helping you feel more rested, call your doctor. He or she can help you figure out what’s causing your fatigue and find a way to treat it.