fear of illusion

[Mehka]

Hi
iam writting for my friend.he had a mouth kissing and vaginal touch six month before and he the hiv status of that lady was unknown.from that day onwards he was so weried and curious that he affected by diseas.consulted many dctors,done hiv test and talked with many speclist and all said he is free from hiv and relted diseas.After that incident he is so sensitive so that he thinks whatever micro changes happen to his body is because he is affected by disease.
The fact is that no disease is affected for him.but he is not acceptting that because of the fear
my questions are:
1)how can we take his fear out
2)is this mentally affected hardly
3)Any treatment for this
please do a detailed answer asap

[Paxiled]

This person might have reached the age when anxiety disorders and depression start to show their ugly heads.  It seems he's developed or developing a chronic anxiety disorder.  I would advise the first step for him is to see a therapist who specializes in anxiety treatment to see if he can get out of this because if he doesn't it will probably just keep getting worse.  For him it's a fear of disease, but it just could have easily have focused on other things.  But it has to be him who chooses to address it -- you can't do that for him.

[Mehka]

is this a serious issue?
may this affect in futur life?
what treatment is there for this.
please give answer for this also.
so concenerd about the issue