I feel very tired and lose appetite in the summerwhat should i do?

Alter diet, get W/U,: This might be normal for you, but if you're worried, try including more fruits and vegetables in your diet, and exercise more as this stimulates a healthy appetite. Also try to include more vegetable/vitamin drinks as this may be easier to take. If this still doesn't work, go see your doctor for a work-up, as you might get an infection that you're susceptible to and that might be the cause.