Is there a difference between hyperthyroidism graves and thyrotoxicosis?

Yes: Thyroid conditions are very specific and it takes examination, and testing to diagnose & treat properly. Many times it takes weeks to months to get the proper diagnosis. This format is not ideal to answer your question. Your endocrinologist needs to see you and your pcp needs to be involved because we can help with other associated medical conditions.

Yes: Thyrotoxicosis describe high thyroid level in the blood which can be caused by many things, one of which is grave's disease (an autoimmune thyroid disease). There are tests available to know what's causing the thyrotoxicosis. You need to see a doctor for these tests and you should because thyrotoxicosis can be very dangerous.

Yes: Strictly speaking thyrotoxicosis is too much thyroid hormone in the blood due to any cause (including taking too much). Hyperthyroidism is a more specific term, implying too much thyroid hormone in the blood due to an overactive thyroid. Despite this distinction, most patients, and many doctors, use these terms interchangeably. Graves' is one specific cause of hyperthyroidism.