Can i have thyroid problems even if i have had no weight gain?

Thyroid: Yes There are many types of thyroid problems. Easy enough to check your thyroid with your doctor. They will do blood tests and perhaps an ultrasound

Yes: Thyroid problems can cause weight gain OR loss. Only way to know is blood testing. You should have your adrenals tested as well, and pituitary problems can certainly cause thyroid to malfunction. Since you have had testing already, makes sense to ask your physician what else might be responsible for your symptoms.

Yes: Not all thyroid problems present with significant weight gain or loss. If you are worried about thyroid problems you should review this concern with your primary care doctor so that he/she can consider thyroid hormone testing. Good luck!

Thyroid dysfunction: Hyperthyroidism has a wide variety of symptoms from losing weight, to skin changes, diarrhea, heat intolerance, heart problem which these should be supported by level of TSH and FT4 in blood, make sure you don't have malabsorption syndrome, that could be a possibility for you not gaining weight if you eat 2000 KCAL a day.

Yes: Hypothyroid patients have low thyroid levels and often (but not always) have symptoms of weight gain, fatigue, dry skin, and hair loss. Some patients with an autoimmune kind of hypothyroidism have high thyroid levels before the levels drop below normal.