My dd had been going to hospital for blood tests regularly since she was 5 days old due to low sodium levels have had various threads about this in last few weeks. Every time we take her the Drs struggle to collect blood and she ends up with various needle marks and bruises on hands feet elbows and legs the hospital are unsure what they are testing for and purely 'monitoring' her levels at the moment. She does not appear unwell and all her other blood tests.blood pressure oxygen says are normal. What would happen if I refuse any further tests unless she begins to feel unwell? On numerous occasions we have had to have the test redone after 5 attempts to withdraw blood as the lab wernt satisfied with the quality and could not test the levels at the moment