I used to go into coma after staying more than 6 hours under medium sunlight. After that I grew onto have a few seizures now and then, and then fainting and now I am just into extreme irritability the occasional throat blockage and the constant sneezing. Also my skin gets extremely dry and painful. But it is better than falling into coma.. So yeah I am pretty sure that most things do get better with time. Be it with treatment or a shot on the bum.