An enlightened Buddha or an arahant never experiences worries, fears, or cravings like ordinary humans even if they appear to. After enlightenment an individual can have wishes, wills, etc...but not in the same way that an ordinary person does.
In regards to health, The Buddha did heal himself on occasions, and could stay alive for an entire world-period:
"And the Blessed One said: "Whosoever, Ananda, has developed,
practiced, employed, strengthened, maintained, scrutinized, and
brought to perfection the four constituents of iddhi power could, if
he so desired, remain throughout a world-period or until the end of
it. The Tathagata, Ananda, has done so. Therefore the Tathagata could,
if he so desired, remain throughout a world-period or until the end of
it."
.....
Then it occurred to the Blessed One: "It would not be
fitting if I came to my final passing away without addressing those
who attended on me, without taking leave of the community of bhikkhus.
Then let me suppress this illness by strength of will, resolve to
maintain the life process, and live on."
And the Blessed One suppressed the illness by strength of will,
resolved to maintain the life process, and lived on. So it came about
that the Blessed One's illness was allayed." - Maha-parinibbana Sutta
After enlightenment The Buddha was doubtless, fearless, and always in bliss regardless.
The Buddha and arahants described this bliss and happiness many times:
"Before, when I has a householder, maintaining the bliss of kingship,
lord, I had guards posted within and without the royal apartments,
within and without the city, within and without the countryside. But
even though I was thus guarded, thus protected, I dwelled in fear —
agitated, distrustful, & afraid. But now, on going alone to the
wilderness, to the root of a tree, or to an empty dwelling, I dwell
without fear, unagitated, confident, & unafraid — unconcerned,
unruffled, my wants satisfied, with my mind like a wild deer. This is
the compelling reason I have in mind that — when going to the
wilderness, to the root of a tree, or to an empty dwelling — I
repeatedly exclaim, 'What bliss! What bliss!'" - Ven. Bhaddiya, Kāḷigodha Sutta
"'Now, I — without moving my body, without uttering a word — can dwell
sensitive to unalloyed pleasure for a day and a night... for two days
& nights... for three... four... five... six... seven days & nights.
So what do you think: That being the case, who dwells in greater
pleasure: King Seniya Bimbisara of Magadha or me?'
"'That being the case, venerable Gotama dwells in greater pleasure
than King Seniya Bimbisara of Magadha.'" - Cula-dukkhakkhandha Sutta
"Any sensual bliss in the world, any heavenly bliss, isn't worth one
sixteenth-sixteenth of the bliss of the ending of craving." - Raja
Sutta
And the Lord Buddha, perceiving that, on this occasion, pronounced
this solemn utterance: "'Happy is the solitude of him who is full of
joy, who has learnt the Truth, who sees (the Truth). Happy is freedom
from malice in this world, (self-)restraint towards all beings that
have life. Happy is freedom from lust in this world, getting beyond
all desires; the putting away of that pride which comes from the
thought "I am!" This truly is the highest happiness!'" (Mahavogga 1.3)
"cessation of perception and feeling" is described as the very most extreme form of pleasure:
"And what, Ananda, is another pleasure more extreme & refined than
that? There is the case where a monk, with the complete transcending
of the dimension of neither perception nor non-perception, enters &
remains in the cessation of perception & feeling. This is another
pleasure more extreme & refined than that.
Now it's possible, Ananda, that some wanderers of other persuasions
might say, 'Gotama the contemplative speaks of the cessation of
perception & feeling and yet describes it as pleasure. What is this?
How can this be?' When they say that, they are to be told, 'It's not
the case, friends, that the Blessed One describes only pleasant
feeling as included under pleasure. Wherever pleasure is found, in
whatever terms, the Blessed One describes it as pleasure.'" -
Pañcakanga Sutta
Many imagine this type of "bliss" as something like relaxation, or a blissful state, but it isn't so, those are merely other "states". It really is the most extreme form of pleasure and happiness, unimaginable, indescribable.
I first experienced the "deep relaxation" state, very peaceful and tranquil, and thought that must be what enlightenment must be like, but then I experienced a higher more blissful state and thought that must be what enlightenment must be like, but then I experienced and even more enjoyable higher state....so eventually I concluded that these higher states and feelings are merely feelings and states, incomparable to the enjoyment that isn't a state or feeling.
The highest state I've personally experienced is extremely enjoyable, you feel full of confidence, fearless, doubtless, sorrowless, worry-free, care-free, stress-free, full of extreme joy. The other forms of happiness, fun, and pleasure I've experienced pale in comparison.
When entered that state I saw how the other states I experienced were merely temporary transient feelings, it's difficult to explain.
Having seen my own errors I know that I haven't achieved perfection or enlightenment yet but maybe eventually I will.
When describing destinations, The Buddha uses a clever analogy to explain what enlightenment is like:
"By encompassing mind with mind I understand a certain person thus:
'This person so behaves, so conducts himself, has taken such a path
that by realizing it for himself with direct knowledge, he here and
now will enter upon and abide in the deliverance of mind and
deliverance by wisdom that are taintless with the destruction of the
taints.'
And then later on I see that by realizing it for himself with direct
knowledge, he here and now enters upon and abides in the deliverance
of mind and deliverance by wisdom that are taintless with the
destruction of the taints, and is experiencing extremely pleasant
feelings.
Suppose there were a pond with clean, agreeable, cool water,
transparent, with smooth banks, delightful, and nearby a dense wood;
and then a man scorched and exhausted by hot weather, weary, parched
and thirsty, came by a path going in one way only and directed towards
that same pond. Then a man with good sight on seeing him would say:
'This person so behaves... that he will come to this same pond'; and
then later on he sees that he has plunged into the pond, bathed, drunk
and relieved all his distress, fatigue and fever and has come out
again and is sitting or lying in the wood experiencing extremely
pleasant feelings.
So too, by encompassing mind with mind... extremely pleasant feelings." - Maha-sihanada Sutta
I think it's a great analogy. It reminds me of a time when I was riding my bike one day and after I became very tired and exhausted I decided to stop by a river. The river looked clean and transparent so I jumped in and swam in the river, it was very relaxing and pleasing.
