Feeling excessively hot and tired can occur due to dehydration, anemia, thyroid problems, vitamin deficiencies, infection, stress, poor sleep, or other medical conditions. Treatment depends on the underlying cause, so medicines should not be started without proper evaluation. It is advisable to get basic tests such as CBC, thyroid profile, blood sugar, vitamin D, and vitamin B12 levels. Stay well hydrated, avoid excessive heat exposure, maintain good sleep, and eat a balanced diet. If weakness is related to nutritional deficiency, doctors may advise supplements such as Iron supplements or Vitamin B12 depending on the deficiency. Please consult a physician if symptoms persist, worsen, or are associated with weight loss, fever, palpitations, or breathlessness.